Merged with https://bitbucket.org/lindenlab/viewer-beta

268 files changed, 2540 insertions, 988 deletions

diff --git a/indra/llcommon/CMakeLists.txt b/indra/llcommon/CMakeLists.txt
index 5cce8ff2c4..95b1d536fe 100644..100755
--- a/indra/llcommon/CMakeLists.txt
+++ b/indra/llcommon/CMakeLists.txt
@@ -17,6 +17,7 @@ include_directories(
     ${EXPAT_INCLUDE_DIRS}
     ${LLCOMMON_INCLUDE_DIRS}
     ${ZLIB_INCLUDE_DIRS}
+    ${BREAKPAD_INCLUDE_DIRECTORIES}
     )
 
 # add_executable(lltreeiterators lltreeiterators.cpp)
@@ -246,7 +247,6 @@ set(llcommon_HEADER_FILES
     lluuid.h
     lluuidhashmap.h
     llversionserver.h
-    llversionviewer.h
     llworkerthread.h
     ll_template_cast.h
     metaclass.h
diff --git a/indra/llcommon/bitpack.cpp b/indra/llcommon/bitpack.cpp
index cdcaba0765..cdcaba0765 100644..100755
--- a/indra/llcommon/bitpack.cpp
+++ b/indra/llcommon/bitpack.cpp
diff --git a/indra/llcommon/bitpack.h b/indra/llcommon/bitpack.h
index 037300dd14..037300dd14 100644..100755
--- a/indra/llcommon/bitpack.h
+++ b/indra/llcommon/bitpack.h
diff --git a/indra/llcommon/ctype_workaround.h b/indra/llcommon/ctype_workaround.h
index 552be9fb90..552be9fb90 100644..100755
--- a/indra/llcommon/ctype_workaround.h
+++ b/indra/llcommon/ctype_workaround.h
diff --git a/indra/llcommon/doublelinkedlist.h b/indra/llcommon/doublelinkedlist.h
index 0aeaa69df3..0aeaa69df3 100644..100755
--- a/indra/llcommon/doublelinkedlist.h
+++ b/indra/llcommon/doublelinkedlist.h
diff --git a/indra/llcommon/fix_macros.h b/indra/llcommon/fix_macros.h
index ef959decff..ef959decff 100644..100755
--- a/indra/llcommon/fix_macros.h
+++ b/indra/llcommon/fix_macros.h
diff --git a/indra/llcommon/imageids.cpp b/indra/llcommon/imageids.cpp
index fe11465221..7d647e5c36 100644..100755
--- a/indra/llcommon/imageids.cpp
+++ b/indra/llcommon/imageids.cpp
@@ -68,3 +68,6 @@ const LLUUID TERRAIN_MOUNTAIN_DETAIL	("303cd381-8560-7579-23f1-f0a880799740"); /
 const LLUUID TERRAIN_ROCK_DETAIL		("53a2f406-4895-1d13-d541-d2e3b86bc19c"); // VIEWER
 
 const LLUUID DEFAULT_WATER_NORMAL		("822ded49-9a6c-f61c-cb89-6df54f42cdf4"); // VIEWER
+
+const LLUUID IMG_CHECKERBOARD_RGBA     ("2585a0f3-4163-6dd1-0f34-ad48cb909e25"); // dataserver
+
diff --git a/indra/llcommon/imageids.h b/indra/llcommon/imageids.h
index e0c2683fdc..18c8ecb074 100644..100755
--- a/indra/llcommon/imageids.h
+++ b/indra/llcommon/imageids.h
@@ -66,4 +66,5 @@ LL_COMMON_API extern const LLUUID TERRAIN_ROCK_DETAIL;
 
 LL_COMMON_API extern const LLUUID DEFAULT_WATER_NORMAL;
 
+LL_COMMON_API extern const LLUUID IMG_CHECKERBOARD_RGBA;
 #endif
diff --git a/indra/llcommon/indra_constants.cpp b/indra/llcommon/indra_constants.cpp
index d32ae6c041..d32ae6c041 100644..100755
--- a/indra/llcommon/indra_constants.cpp
+++ b/indra/llcommon/indra_constants.cpp
diff --git a/indra/llcommon/indra_constants.h b/indra/llcommon/indra_constants.h
index 0da83720bd..0da83720bd 100644..100755
--- a/indra/llcommon/indra_constants.h
+++ b/indra/llcommon/indra_constants.h
diff --git a/indra/llcommon/is_approx_equal_fraction.h b/indra/llcommon/is_approx_equal_fraction.h
index 4a9b2e2725..4a9b2e2725 100644..100755
--- a/indra/llcommon/is_approx_equal_fraction.h
+++ b/indra/llcommon/is_approx_equal_fraction.h
diff --git a/indra/llcommon/linden_common.h b/indra/llcommon/linden_common.h
index 5cfcdab41c..5cfcdab41c 100644..100755
--- a/indra/llcommon/linden_common.h
+++ b/indra/llcommon/linden_common.h
diff --git a/indra/llcommon/linked_lists.h b/indra/llcommon/linked_lists.h
index 6b25295b7b..6b25295b7b 100644..100755
--- a/indra/llcommon/linked_lists.h
+++ b/indra/llcommon/linked_lists.h
diff --git a/indra/llcommon/ll_template_cast.h b/indra/llcommon/ll_template_cast.h
index c8f9a2f7eb..c8f9a2f7eb 100644..100755
--- a/indra/llcommon/ll_template_cast.h
+++ b/indra/llcommon/ll_template_cast.h
diff --git a/indra/llcommon/llaccountingcost.h b/indra/llcommon/llaccountingcost.h
index 0ef3b50c6d..0ef3b50c6d 100644..100755
--- a/indra/llcommon/llaccountingcost.h
+++ b/indra/llcommon/llaccountingcost.h
diff --git a/indra/llcommon/llagentconstants.h b/indra/llcommon/llagentconstants.h
index cd237da4eb..cd237da4eb 100644..100755
--- a/indra/llcommon/llagentconstants.h
+++ b/indra/llcommon/llagentconstants.h
diff --git a/indra/llcommon/llallocator.cpp b/indra/llcommon/llallocator.cpp
index 34fc28d8cc..34fc28d8cc 100644..100755
--- a/indra/llcommon/llallocator.cpp
+++ b/indra/llcommon/llallocator.cpp
diff --git a/indra/llcommon/llallocator.h b/indra/llcommon/llallocator.h
index d26ad73c5b..d26ad73c5b 100644..100755
--- a/indra/llcommon/llallocator.h
+++ b/indra/llcommon/llallocator.h
diff --git a/indra/llcommon/llallocator_heap_profile.cpp b/indra/llcommon/llallocator_heap_profile.cpp
index b574ef668b..b574ef668b 100644..100755
--- a/indra/llcommon/llallocator_heap_profile.cpp
+++ b/indra/llcommon/llallocator_heap_profile.cpp
diff --git a/indra/llcommon/llallocator_heap_profile.h b/indra/llcommon/llallocator_heap_profile.h
index 69300b829b..69300b829b 100644..100755
--- a/indra/llcommon/llallocator_heap_profile.h
+++ b/indra/llcommon/llallocator_heap_profile.h
diff --git a/indra/llcommon/llapp.cpp b/indra/llcommon/llapp.cpp
index ca258900c7..c6da205815 100644..100755
--- a/indra/llcommon/llapp.cpp
+++ b/indra/llcommon/llapp.cpp
@@ -69,10 +69,16 @@ bool windows_post_minidump_callback(const wchar_t* dump_path,
 void setup_signals();
 void default_unix_signal_handler(int signum, siginfo_t *info, void *);
 
+#if LL_LINUX
+#include "google_breakpad/minidump_descriptor.h"
+bool unix_minidump_callback(const google_breakpad::MinidumpDescriptor& minidump_desc, void* context, bool succeeded);
+#else
 // Called by breakpad exception handler after the minidump has been generated.
 bool unix_post_minidump_callback(const char *dump_dir,
 					  const char *minidump_id,
 					  void *context, bool succeeded);
+#endif
+
 # if LL_DARWIN
 /* OSX doesn't support SIGRT* */
 S32 LL_SMACKDOWN_SIGNAL = SIGUSR1;
@@ -313,7 +319,7 @@ void LLApp::setupErrorHandling()
 	
 	// Add google breakpad exception handler configured for Darwin/Linux.
 	bool installHandler = true;
-#ifdef LL_DARWIN
+#if LL_DARWIN
 	// For the special case of Darwin, we do not want to install the handler if
 	// the process is being debugged as the app will exit with value ABRT (6) if
 	// we do.  Unfortunately, the code below which performs that test relies on
@@ -346,14 +352,21 @@ void LLApp::setupErrorHandling()
 		installHandler = true;
 	}
 	#endif
-#endif
+
 	if(installHandler && (mExceptionHandler == 0))
 	{
 		std::string dumpPath = "/tmp/";
-		mExceptionHandler = new google_breakpad::ExceptionHandler(dumpPath, 0, &unix_post_minidump_callback, 0, true);
+		mExceptionHandler = new google_breakpad::ExceptionHandler(dumpPath, 0, &unix_post_minidump_callback, 0, true, 0);
+	}
+#elif LL_LINUX
+	if(installHandler && (mExceptionHandler == 0))
+	{
+		google_breakpad::MinidumpDescriptor desc("/tmp");
+	        new google_breakpad::ExceptionHandler(desc, 0, &unix_minidump_callback, 0, true, 0);
 	}
 #endif
 
+#endif
 	startErrorThread();
 }
 
@@ -410,6 +423,9 @@ void LLApp::setMiniDumpDir(const std::string &path)
 	wchar_t buffer[MAX_MINDUMP_PATH_LENGTH];
 	mbstowcs(buffer, path.c_str(), MAX_MINDUMP_PATH_LENGTH);
 	mExceptionHandler->set_dump_path(std::wstring(buffer));
+#elif LL_LINUX
+        google_breakpad::MinidumpDescriptor desc(path);
+	mExceptionHandler->set_minidump_descriptor(desc);
 #else
 	mExceptionHandler->set_dump_path(path);
 #endif
@@ -857,6 +873,43 @@ void default_unix_signal_handler(int signum, siginfo_t *info, void *)
 	}
 }
 
+#if LL_LINUX
+bool unix_minidump_callback(const google_breakpad::MinidumpDescriptor& minidump_desc, void* context, bool succeeded)
+{
+	// Copy minidump file path into fixed buffer in the app instance to avoid
+	// heap allocations in a crash handler.
+	
+	// path format: <dump_dir>/<minidump_id>.dmp
+	int dirPathLength = strlen(minidump_desc.path());
+	
+	// The path must not be truncated.
+	llassert((dirPathLength + 5) <= LLApp::MAX_MINDUMP_PATH_LENGTH);
+	
+	char * path = LLApp::instance()->getMiniDumpFilename();
+	S32 remaining = LLApp::MAX_MINDUMP_PATH_LENGTH;
+	strncpy(path, minidump_desc.path(), remaining);
+	remaining -= dirPathLength;
+	path += dirPathLength;
+	if (remaining > 0 && dirPathLength > 0 && path[-1] != '/')
+	{
+		*path++ = '/';
+		--remaining;
+	}
+	
+	llinfos << "generated minidump: " << LLApp::instance()->getMiniDumpFilename() << llendl;
+	LLApp::runErrorHandler();
+	
+#ifndef LL_RELEASE_FOR_DOWNLOAD
+	clear_signals();
+	return false;
+#else
+	return true;
+#endif
+
+}
+#endif
+
+
 bool unix_post_minidump_callback(const char *dump_dir,
 					  const char *minidump_id,
 					  void *context, bool succeeded)
diff --git a/indra/llcommon/llapp.h b/indra/llcommon/llapp.h
index a536a06ea5..afa06df23e 100644..100755
--- a/indra/llcommon/llapp.h
+++ b/indra/llcommon/llapp.h
@@ -38,7 +38,7 @@ typedef LLAtomic32<U32> LLAtomicU32;
 class LLErrorThread;
 class LLLiveFile;
 #if LL_LINUX
-typedef struct siginfo siginfo_t;
+#include <signal.h>
 #endif
 
 typedef void (*LLAppErrorHandler)();
diff --git a/indra/llcommon/llapr.cpp b/indra/llcommon/llapr.cpp
index d1c44c9403..d1c44c9403 100644..100755
--- a/indra/llcommon/llapr.cpp
+++ b/indra/llcommon/llapr.cpp
diff --git a/indra/llcommon/llapr.h b/indra/llcommon/llapr.h
index 034546c3f3..752574c65d 100644..100755
--- a/indra/llcommon/llapr.h
+++ b/indra/llcommon/llapr.h
@@ -182,8 +182,10 @@ typedef LLAtomic32<S32> LLAtomicS32;
 // abbreviated flags
 #define LL_APR_R (APR_READ) // "r"
 #define LL_APR_W (APR_CREATE|APR_TRUNCATE|APR_WRITE) // "w"
+#define LL_APR_A (APR_CREATE|APR_WRITE|APR_APPEND) // "w"
 #define LL_APR_RB (APR_READ|APR_BINARY) // "rb"
 #define LL_APR_WB (APR_CREATE|APR_TRUNCATE|APR_WRITE|APR_BINARY) // "wb"
+#define LL_APR_AB (APR_CREATE|APR_WRITE|APR_BINARY|APR_APPEND)
 #define LL_APR_RPB (APR_READ|APR_WRITE|APR_BINARY) // "r+b"
 #define LL_APR_WPB (APR_CREATE|APR_TRUNCATE|APR_READ|APR_WRITE|APR_BINARY) // "w+b"
 
diff --git a/indra/llcommon/llassettype.cpp b/indra/llcommon/llassettype.cpp
index 5e566d6c7c..5ae2df3994 100644..100755
--- a/indra/llcommon/llassettype.cpp
+++ b/indra/llcommon/llassettype.cpp
@@ -95,6 +95,7 @@ LLAssetDictionary::LLAssetDictionary()
 	addEntry(LLAssetType::AT_LINK_FOLDER, 		new AssetEntry("FOLDER_LINK",		"link_f", 	"sym folder link",	false,		false,		true));
 	addEntry(LLAssetType::AT_MESH,              new AssetEntry("MESH",              "mesh",     "mesh",             false,      false,      false));
 	addEntry(LLAssetType::AT_WIDGET,            new AssetEntry("WIDGET",            "widget",   "widget",           false,      false,      false));
+	addEntry(LLAssetType::AT_PERSON,            new AssetEntry("PERSON",            "person",   "person",           false,      false,      false));
 	addEntry(LLAssetType::AT_NONE, 				new AssetEntry("NONE",				"-1",		NULL,		  		FALSE,		FALSE,		FALSE));
 
 };
diff --git a/indra/llcommon/llassettype.h b/indra/llcommon/llassettype.h
index d538accbf7..69b01731e5 100644..100755
--- a/indra/llcommon/llassettype.h
+++ b/indra/llcommon/llassettype.h
@@ -112,6 +112,9 @@ public:
 		AT_WIDGET = 40,
 			// UI Widget: this is *not* an inventory asset type, only a viewer side asset (e.g. button, other ui items...)
 		
+		AT_PERSON = 45,
+			// A user uuid  which is not an inventory asset type, used in viewer only for adding a person to a chat via drag and drop.
+
 		AT_MESH = 49,
 			// Mesh data in our proprietary SLM format
 		
diff --git a/indra/llcommon/llassoclist.h b/indra/llcommon/llassoclist.h
index 2950504155..2950504155 100644..100755
--- a/indra/llcommon/llassoclist.h
+++ b/indra/llcommon/llassoclist.h
diff --git a/indra/llcommon/llavatarconstants.h b/indra/llcommon/llavatarconstants.h
index f47f447b45..f47f447b45 100644..100755
--- a/indra/llcommon/llavatarconstants.h
+++ b/indra/llcommon/llavatarconstants.h
diff --git a/indra/llcommon/llavatarname.cpp b/indra/llcommon/llavatarname.cpp
index 3206843bf4..642bd82e90 100644..100755
--- a/indra/llcommon/llavatarname.cpp
+++ b/indra/llcommon/llavatarname.cpp
@@ -30,6 +30,7 @@
 #include "llavatarname.h"
 
 #include "lldate.h"
+#include "llframetimer.h"
 #include "llsd.h"
 
 // Store these in pre-built std::strings to avoid memory allocations in
@@ -42,6 +43,14 @@ static const std::string IS_DISPLAY_NAME_DEFAULT("is_display_name_default");
 static const std::string DISPLAY_NAME_EXPIRES("display_name_expires");
 static const std::string DISPLAY_NAME_NEXT_UPDATE("display_name_next_update");
 
+bool LLAvatarName::sUseDisplayNames = true;
+
+// Minimum time-to-live (in seconds) for a name entry.
+// Avatar name should always guarantee to expire reasonably soon by default
+// so if the failure to get a valid expiration time was due to something temporary 
+// we will eventually request and get the right data.
+const F64 MIN_ENTRY_LIFETIME = 60.0;
+
 LLAvatarName::LLAvatarName()
 :	mUsername(),
 	mDisplayName(),
@@ -61,6 +70,17 @@ bool LLAvatarName::operator<(const LLAvatarName& rhs) const
 		return mUsername < rhs.mUsername;
 }
 
+//static 
+void LLAvatarName::setUseDisplayNames(bool use)
+{
+	sUseDisplayNames = use;
+}
+//static 
+bool LLAvatarName::useDisplayNames() 
+{ 
+	return sUseDisplayNames; 
+}
+
 LLSD LLAvatarName::asLLSD() const
 {
 	LLSD sd;
@@ -85,21 +105,75 @@ void LLAvatarName::fromLLSD(const LLSD& sd)
 	mExpires = expires.secondsSinceEpoch();
 	LLDate next_update = sd[DISPLAY_NAME_NEXT_UPDATE];
 	mNextUpdate = next_update.secondsSinceEpoch();
+	
+	// Some avatars don't have explicit display names set. Force a legible display name here.
+	if (mDisplayName.empty())
+	{
+		mDisplayName = mUsername;
+	}
+}
+
+// Transform a string (typically provided by the legacy service) into a decent
+// avatar name instance.
+void LLAvatarName::fromString(const std::string& full_name)
+{
+	mDisplayName = full_name;
+	std::string::size_type index = full_name.find(' ');
+	if (index != std::string::npos)
+	{
+		// The name is in 2 parts (first last)
+		mLegacyFirstName = full_name.substr(0, index);
+		mLegacyLastName = full_name.substr(index+1);
+		if (mLegacyLastName != "Resident")
+		{
+			mUsername = mLegacyFirstName + "." + mLegacyLastName;
+			mDisplayName = full_name;
+			LLStringUtil::toLower(mUsername);
+		}
+		else
+		{
+			// Very old names do have a dummy "Resident" last name 
+			// that we choose to hide from users.
+			mUsername = mLegacyFirstName;
+			mDisplayName = mLegacyFirstName;
+		}
+	}
+	else
+	{
+		mLegacyFirstName = full_name;
+		mLegacyLastName = "";
+		mUsername = full_name;
+		mDisplayName = full_name;
+	}
+	mIsDisplayNameDefault = true;
+	mIsTemporaryName = true;
+	setExpires(MIN_ENTRY_LIFETIME);
+}
+
+void LLAvatarName::setExpires(F64 expires)
+{
+	mExpires = LLFrameTimer::getTotalSeconds() + expires;
 }
 
 std::string LLAvatarName::getCompleteName() const
 {
 	std::string name;
-	if (mUsername.empty() || mIsDisplayNameDefault)
-	// If the display name feature is off
-	// OR this particular display name is defaulted (i.e. based on user name),
-	// then display only the easier to read instance of the person's name.
+	if (sUseDisplayNames)
 	{
-		name = mDisplayName;
+		if (mUsername.empty() || mIsDisplayNameDefault)
+		{
+			// If this particular display name is defaulted (i.e. based on user name),
+			// then display only the easier to read instance of the person's name.
+			name = mDisplayName;
+		}
+		else
+		{
+			name = mDisplayName + " (" + mUsername + ")";
+		}
 	}
 	else
 	{
-		name = mDisplayName + " (" + mUsername + ")";
+		name = getUserName();
 	}
 	return name;
 }
@@ -118,3 +192,48 @@ std::string LLAvatarName::getLegacyName() const
 	name += mLegacyLastName;
 	return name;
 }
+
+std::string LLAvatarName::getDisplayName() const
+{
+	if (sUseDisplayNames)
+	{
+		return mDisplayName;
+	}
+	else
+	{
+		return getUserName();
+	}
+}
+
+std::string LLAvatarName::getUserName() const
+{
+	std::string name;
+	if (mLegacyLastName.empty() || (mLegacyLastName == "Resident"))
+	{
+		if (mLegacyFirstName.empty())
+		{
+			// If we cannot create a user name from the legacy strings, use the display name
+			name = mDisplayName;
+		}
+		else
+		{
+			// The last name might be empty if it defaulted to "Resident"
+			name = mLegacyFirstName;
+		}
+	}
+	else
+	{
+		name = mLegacyFirstName + " " + mLegacyLastName;
+	}
+	return name;
+}
+
+void LLAvatarName::dump() const
+{
+	LL_DEBUGS("AvNameCache") << "LLAvatarName: "
+	                         << "user '" << mUsername << "' "
+							 << "display '" << mDisplayName << "' "
+	                         << "expires in " << mExpires - LLFrameTimer::getTotalSeconds() << " seconds"
+							 << LL_ENDL;
+}
+
diff --git a/indra/llcommon/llavatarname.h b/indra/llcommon/llavatarname.h
index ba258d6d52..7542a8dece 100644..100755
--- a/indra/llcommon/llavatarname.h
+++ b/indra/llcommon/llavatarname.h
@@ -39,10 +39,27 @@ public:
 	
 	bool operator<(const LLAvatarName& rhs) const;
 
+	// Conversion to and from LLSD (cache file or server response)
 	LLSD asLLSD() const;
-
 	void fromLLSD(const LLSD& sd);
 
+	// Used only in legacy mode when the display name capability is not provided server side
+	// or to otherwise create a temporary valid item.
+	void fromString(const std::string& full_name);
+	
+	// Set the name object to become invalid in "expires" seconds from now
+	void setExpires(F64 expires);
+
+	// Set and get the display name flag set by the user in preferences.
+	static void setUseDisplayNames(bool use);
+	static bool useDisplayNames();
+	
+	// A name object is valid if not temporary and not yet expired (default is expiration not checked)
+	bool isValidName(F64 max_unrefreshed = 0.0f) const { return !mIsTemporaryName && (mExpires >= max_unrefreshed); }
+	
+	// Return true if the name is made up from legacy or temporary data
+	bool isDisplayNameDefault() const { return mIsDisplayNameDefault; }
+	
 	// For normal names, returns "James Linden (james.linden)"
 	// When display names are disabled returns just "James Linden"
 	std::string getCompleteName() const;
@@ -51,11 +68,38 @@ public:
 	// compatibility with systems like voice and muting
 	// *TODO: Eliminate this in favor of username only
 	std::string getLegacyName() const;
+	
+	// "José Sanchez" or "James Linden", UTF-8 encoded Unicode
+	// Takes the display name preference into account. This is truly the name that should 
+	// be used for all UI where an avatar name has to be used unless we truly want something else (rare)
+	std::string getDisplayName() const;
+	
+	// Returns "James Linden" or "bobsmith123 Resident"
+	// Used where we explicitely prefer or need a non UTF-8 legacy (ASCII) name
+	// Also used for backwards compatibility with systems like voice and muting
+	std::string getUserName() const;
+	
+	// Returns "james.linden" or the legacy name for very old names
+	std::string getAccountName() const { return mUsername; }
 
+	// Debug print of the object
+	void dump() const;
+	
+	// Names can change, so need to keep track of when name was
+	// last checked.
+	// Unix time-from-epoch seconds for efficiency
+	F64 mExpires;
+	
+	// You can only change your name every N hours, so record
+	// when the next update is allowed
+	// Unix time-from-epoch seconds
+	F64 mNextUpdate;
+	
+private:
 	// "bobsmith123" or "james.linden", US-ASCII only
 	std::string mUsername;
 
-	// "Jose' Sanchez" or "James Linden", UTF-8 encoded Unicode
+	// "José Sanchez" or "James Linden", UTF-8 encoded Unicode
 	// Contains data whether or not user has explicitly set
 	// a display name; may duplicate their username.
 	std::string mDisplayName;
@@ -81,15 +125,9 @@ public:
 	// shown in UI, but are not serialized.
 	bool mIsTemporaryName;
 
-	// Names can change, so need to keep track of when name was
-	// last checked.
-	// Unix time-from-epoch seconds for efficiency
-	F64 mExpires;
-	
-	// You can only change your name every N hours, so record
-	// when the next update is allowed
-	// Unix time-from-epoch seconds
-	F64 mNextUpdate;
+	// Global flag indicating if display name should be used or not
+	// This will affect the output of the high level "get" methods
+	static bool sUseDisplayNames;
 };
 
 #endif
diff --git a/indra/llcommon/llbase32.cpp b/indra/llcommon/llbase32.cpp
index 053ac0d32f..053ac0d32f 100644..100755
--- a/indra/llcommon/llbase32.cpp
+++ b/indra/llcommon/llbase32.cpp
diff --git a/indra/llcommon/llbase32.h b/indra/llcommon/llbase32.h
index eeb96d789d..eeb96d789d 100644..100755
--- a/indra/llcommon/llbase32.h
+++ b/indra/llcommon/llbase32.h
diff --git a/indra/llcommon/llbase64.cpp b/indra/llcommon/llbase64.cpp
index 4e82cf7f20..4e82cf7f20 100644..100755
--- a/indra/llcommon/llbase64.cpp
+++ b/indra/llcommon/llbase64.cpp
diff --git a/indra/llcommon/llbase64.h b/indra/llcommon/llbase64.h
index 16d2c217d0..16d2c217d0 100644..100755
--- a/indra/llcommon/llbase64.h
+++ b/indra/llcommon/llbase64.h
diff --git a/indra/llcommon/llboost.h b/indra/llcommon/llboost.h
index 57d958a51a..57d958a51a 100644..100755
--- a/indra/llcommon/llboost.h
+++ b/indra/llcommon/llboost.h
diff --git a/indra/llcommon/llchat.h b/indra/llcommon/llchat.h
index f5b242fdfc..f5b242fdfc 100644..100755
--- a/indra/llcommon/llchat.h
+++ b/indra/llcommon/llchat.h
diff --git a/indra/llcommon/llclickaction.h b/indra/llcommon/llclickaction.h
index 1f87d8eec3..1f87d8eec3 100644..100755
--- a/indra/llcommon/llclickaction.h
+++ b/indra/llcommon/llclickaction.h
diff --git a/indra/llcommon/llcommon.cpp b/indra/llcommon/llcommon.cpp
index 8be9e4f4de..8be9e4f4de 100644..100755
--- a/indra/llcommon/llcommon.cpp
+++ b/indra/llcommon/llcommon.cpp
diff --git a/indra/llcommon/llcommon.h b/indra/llcommon/llcommon.h
index ca9cad5d05..ca9cad5d05 100644..100755
--- a/indra/llcommon/llcommon.h
+++ b/indra/llcommon/llcommon.h
diff --git a/indra/llcommon/llcommonutils.cpp b/indra/llcommon/llcommonutils.cpp
index d82554c202..d82554c202 100644..100755
--- a/indra/llcommon/llcommonutils.cpp
+++ b/indra/llcommon/llcommonutils.cpp
diff --git a/indra/llcommon/llcommonutils.h b/indra/llcommon/llcommonutils.h
index 755dc41fb4..755dc41fb4 100644..100755
--- a/indra/llcommon/llcommonutils.h
+++ b/indra/llcommon/llcommonutils.h
diff --git a/indra/llcommon/llcoros.cpp b/indra/llcommon/llcoros.cpp
index 9122704306..9122704306 100644..100755
--- a/indra/llcommon/llcoros.cpp
+++ b/indra/llcommon/llcoros.cpp
diff --git a/indra/llcommon/llcoros.h b/indra/llcommon/llcoros.h
index 03df406b68..03df406b68 100644..100755
--- a/indra/llcommon/llcoros.h
+++ b/indra/llcommon/llcoros.h
diff --git a/indra/llcommon/llcrc.cpp b/indra/llcommon/llcrc.cpp
index e80da0bb0d..e80da0bb0d 100644..100755
--- a/indra/llcommon/llcrc.cpp
+++ b/indra/llcommon/llcrc.cpp
diff --git a/indra/llcommon/llcrc.h b/indra/llcommon/llcrc.h
index 2d291d92a1..2d291d92a1 100644..100755
--- a/indra/llcommon/llcrc.h
+++ b/indra/llcommon/llcrc.h
diff --git a/indra/llcommon/llcriticaldamp.cpp b/indra/llcommon/llcriticaldamp.cpp
index 87d79b1ee0..87d79b1ee0 100644..100755
--- a/indra/llcommon/llcriticaldamp.cpp
+++ b/indra/llcommon/llcriticaldamp.cpp
diff --git a/indra/llcommon/llcriticaldamp.h b/indra/llcommon/llcriticaldamp.h
index 52f052ae25..52f052ae25 100644..100755
--- a/indra/llcommon/llcriticaldamp.h
+++ b/indra/llcommon/llcriticaldamp.h
diff --git a/indra/llcommon/llcursortypes.cpp b/indra/llcommon/llcursortypes.cpp
index ec60097195..ec60097195 100644..100755
--- a/indra/llcommon/llcursortypes.cpp
+++ b/indra/llcommon/llcursortypes.cpp
diff --git a/indra/llcommon/llcursortypes.h b/indra/llcommon/llcursortypes.h
index cb6d6636a0..cb6d6636a0 100644..100755
--- a/indra/llcommon/llcursortypes.h
+++ b/indra/llcommon/llcursortypes.h
diff --git a/indra/llcommon/lldarray.h b/indra/llcommon/lldarray.h
index 131b819c99..131b819c99 100644..100755
--- a/indra/llcommon/lldarray.h
+++ b/indra/llcommon/lldarray.h
diff --git a/indra/llcommon/lldarrayptr.h b/indra/llcommon/lldarrayptr.h
index c9a0b204d1..c9a0b204d1 100644..100755
--- a/indra/llcommon/lldarrayptr.h
+++ b/indra/llcommon/lldarrayptr.h
diff --git a/indra/llcommon/lldate.cpp b/indra/llcommon/lldate.cpp
index 030ef6a3c7..030ef6a3c7 100644..100755
--- a/indra/llcommon/lldate.cpp
+++ b/indra/llcommon/lldate.cpp
diff --git a/indra/llcommon/lldate.h b/indra/llcommon/lldate.h
index 7ff8b550ad..7ff8b550ad 100644..100755
--- a/indra/llcommon/lldate.h
+++ b/indra/llcommon/lldate.h
diff --git a/indra/llcommon/lldefs.h b/indra/llcommon/lldefs.h
index 5a4b8325f4..5a4b8325f4 100644..100755
--- a/indra/llcommon/lldefs.h
+++ b/indra/llcommon/lldefs.h
diff --git a/indra/llcommon/lldeleteutils.h b/indra/llcommon/lldeleteutils.h
index f250dc3028..f250dc3028 100644..100755
--- a/indra/llcommon/lldeleteutils.h
+++ b/indra/llcommon/lldeleteutils.h
diff --git a/indra/llcommon/lldependencies.cpp b/indra/llcommon/lldependencies.cpp
index 0e72c175cb..0e72c175cb 100644..100755
--- a/indra/llcommon/lldependencies.cpp
+++ b/indra/llcommon/lldependencies.cpp
diff --git a/indra/llcommon/lldependencies.h b/indra/llcommon/lldependencies.h
index e0294e271b..e0294e271b 100644..100755
--- a/indra/llcommon/lldependencies.h
+++ b/indra/llcommon/lldependencies.h
diff --git a/indra/llcommon/lldepthstack.h b/indra/llcommon/lldepthstack.h
index d9db54efc7..d9db54efc7 100644..100755
--- a/indra/llcommon/lldepthstack.h
+++ b/indra/llcommon/lldepthstack.h
diff --git a/indra/llcommon/lldictionary.cpp b/indra/llcommon/lldictionary.cpp
index e16c35ed6a..e16c35ed6a 100644..100755
--- a/indra/llcommon/lldictionary.cpp
+++ b/indra/llcommon/lldictionary.cpp
diff --git a/indra/llcommon/lldictionary.h b/indra/llcommon/lldictionary.h
index bc3bc3e74a..c752859a36 100644..100755
--- a/indra/llcommon/lldictionary.h
+++ b/indra/llcommon/lldictionary.h
@@ -30,6 +30,8 @@
 #include <map>
 #include <string>
 
+#include "llerror.h"
+
 struct LL_COMMON_API LLDictionaryEntry
 {
 	LLDictionaryEntry(const std::string &name);
diff --git a/indra/llcommon/lldlinked.h b/indra/llcommon/lldlinked.h
index 3f7c197be7..3f7c197be7 100644..100755
--- a/indra/llcommon/lldlinked.h
+++ b/indra/llcommon/lldlinked.h
diff --git a/indra/llcommon/lldoubledispatch.h b/indra/llcommon/lldoubledispatch.h
index 8ed295b6f1..8ed295b6f1 100644..100755
--- a/indra/llcommon/lldoubledispatch.h
+++ b/indra/llcommon/lldoubledispatch.h
diff --git a/indra/llcommon/lldqueueptr.h b/indra/llcommon/lldqueueptr.h
index 9fe08191e1..9fe08191e1 100644..100755
--- a/indra/llcommon/lldqueueptr.h
+++ b/indra/llcommon/lldqueueptr.h
diff --git a/indra/llcommon/llendianswizzle.h b/indra/llcommon/llendianswizzle.h
index 4c08074a9c..4c08074a9c 100644..100755
--- a/indra/llcommon/llendianswizzle.h
+++ b/indra/llcommon/llendianswizzle.h
diff --git a/indra/llcommon/llenum.h b/indra/llcommon/llenum.h
index f57b2bc0b5..f57b2bc0b5 100644..100755
--- a/indra/llcommon/llenum.h
+++ b/indra/llcommon/llenum.h
diff --git a/indra/llcommon/llerror.cpp b/indra/llcommon/llerror.cpp
index 9b0141eb76..9b0141eb76 100644..100755
--- a/indra/llcommon/llerror.cpp
+++ b/indra/llcommon/llerror.cpp
diff --git a/indra/llcommon/llerror.h b/indra/llcommon/llerror.h
index b65b410153..b65b410153 100644..100755
--- a/indra/llcommon/llerror.h
+++ b/indra/llcommon/llerror.h
diff --git a/indra/llcommon/llerrorcontrol.h b/indra/llcommon/llerrorcontrol.h
index 480654b1a2..480654b1a2 100644..100755
--- a/indra/llcommon/llerrorcontrol.h
+++ b/indra/llcommon/llerrorcontrol.h
diff --git a/indra/llcommon/llerrorlegacy.h b/indra/llcommon/llerrorlegacy.h
index 37cee579cd..37cee579cd 100644..100755
--- a/indra/llcommon/llerrorlegacy.h
+++ b/indra/llcommon/llerrorlegacy.h
diff --git a/indra/llcommon/llerrorthread.cpp b/indra/llcommon/llerrorthread.cpp
index 950fcd6e83..950fcd6e83 100644..100755
--- a/indra/llcommon/llerrorthread.cpp
+++ b/indra/llcommon/llerrorthread.cpp
diff --git a/indra/llcommon/llerrorthread.h b/indra/llcommon/llerrorthread.h
index 474cef3a50..474cef3a50 100644..100755
--- a/indra/llcommon/llerrorthread.h
+++ b/indra/llcommon/llerrorthread.h
diff --git a/indra/llcommon/llevent.cpp b/indra/llcommon/llevent.cpp
index 633df01588..633df01588 100644..100755
--- a/indra/llcommon/llevent.cpp
+++ b/indra/llcommon/llevent.cpp
diff --git a/indra/llcommon/llevent.h b/indra/llcommon/llevent.h
index 8cd682b8bf..8cd682b8bf 100644..100755
--- a/indra/llcommon/llevent.h
+++ b/indra/llcommon/llevent.h
diff --git a/indra/llcommon/lleventapi.cpp b/indra/llcommon/lleventapi.cpp
index ff5459c1eb..ff5459c1eb 100644..100755
--- a/indra/llcommon/lleventapi.cpp
+++ b/indra/llcommon/lleventapi.cpp
diff --git a/indra/llcommon/lleventapi.h b/indra/llcommon/lleventapi.h
index 1a37d780b6..1a37d780b6 100644..100755
--- a/indra/llcommon/lleventapi.h
+++ b/indra/llcommon/lleventapi.h
diff --git a/indra/llcommon/lleventcoro.cpp b/indra/llcommon/lleventcoro.cpp
index 81cc33fbba..81cc33fbba 100644..100755
--- a/indra/llcommon/lleventcoro.cpp
+++ b/indra/llcommon/lleventcoro.cpp
diff --git a/indra/llcommon/lleventcoro.h b/indra/llcommon/lleventcoro.h
index a42af63b65..a42af63b65 100644..100755
--- a/indra/llcommon/lleventcoro.h
+++ b/indra/llcommon/lleventcoro.h
diff --git a/indra/llcommon/lleventdispatcher.cpp b/indra/llcommon/lleventdispatcher.cpp
index 5b6d4efbe9..5b6d4efbe9 100644..100755
--- a/indra/llcommon/lleventdispatcher.cpp
+++ b/indra/llcommon/lleventdispatcher.cpp
diff --git a/indra/llcommon/lleventdispatcher.h b/indra/llcommon/lleventdispatcher.h
index 7acc61de4e..7acc61de4e 100644..100755
--- a/indra/llcommon/lleventdispatcher.h
+++ b/indra/llcommon/lleventdispatcher.h
diff --git a/indra/llcommon/lleventemitter.h b/indra/llcommon/lleventemitter.h
index cd82fc56f9..cd82fc56f9 100644..100755
--- a/indra/llcommon/lleventemitter.h
+++ b/indra/llcommon/lleventemitter.h
diff --git a/indra/llcommon/lleventfilter.cpp b/indra/llcommon/lleventfilter.cpp
index d36a107254..d36a107254 100644..100755
--- a/indra/llcommon/lleventfilter.cpp
+++ b/indra/llcommon/lleventfilter.cpp
diff --git a/indra/llcommon/lleventfilter.h b/indra/llcommon/lleventfilter.h
index e822a664f5..e822a664f5 100644..100755
--- a/indra/llcommon/lleventfilter.h
+++ b/indra/llcommon/lleventfilter.h
diff --git a/indra/llcommon/llevents.cpp b/indra/llcommon/llevents.cpp
index 0855180dcd..0855180dcd 100644..100755
--- a/indra/llcommon/llevents.cpp
+++ b/indra/llcommon/llevents.cpp
diff --git a/indra/llcommon/llevents.h b/indra/llcommon/llevents.h
index 65b0fef354..65b0fef354 100644..100755
--- a/indra/llcommon/llevents.h
+++ b/indra/llcommon/llevents.h
diff --git a/indra/llcommon/lleventtimer.cpp b/indra/llcommon/lleventtimer.cpp
index 0d96e03da4..0d96e03da4 100644..100755
--- a/indra/llcommon/lleventtimer.cpp
+++ b/indra/llcommon/lleventtimer.cpp
diff --git a/indra/llcommon/lleventtimer.h b/indra/llcommon/lleventtimer.h
index 7f42623d01..7f42623d01 100644..100755
--- a/indra/llcommon/lleventtimer.h
+++ b/indra/llcommon/lleventtimer.h
diff --git a/indra/llcommon/llextendedstatus.h b/indra/llcommon/llextendedstatus.h
index 8ce173d1ff..8ce173d1ff 100644..100755
--- a/indra/llcommon/llextendedstatus.h
+++ b/indra/llcommon/llextendedstatus.h
diff --git a/indra/llcommon/llfasttimer.cpp b/indra/llcommon/llfasttimer.cpp
index 6970c29092..9b15804e97 100644..100755
--- a/indra/llcommon/llfasttimer.cpp
+++ b/indra/llcommon/llfasttimer.cpp
@@ -561,6 +561,12 @@ std::vector<LLFastTimer::NamedTimer*>& LLFastTimer::NamedTimer::getChildren()
 	return mChildren;
 }
 
+// static
+LLFastTimer::NamedTimer& LLFastTimer::NamedTimer::getRootNamedTimer()
+{
+        return *NamedTimerFactory::instance().getRootTimer();
+}
+
 //static
 void LLFastTimer::nextFrame()
 {
diff --git a/indra/llcommon/llfasttimer.h b/indra/llcommon/llfasttimer.h
index e42e549df5..81c4b78775 100644..100755
--- a/indra/llcommon/llfasttimer.h
+++ b/indra/llcommon/llfasttimer.h
@@ -91,6 +91,8 @@ public:
 		U32 getHistoricalCount(S32 history_index = 0) const;
 		U32 getHistoricalCalls(S32 history_index = 0) const;
 
+		static NamedTimer& getRootNamedTimer();
+
 		void setFrameState(FrameState* state) { mFrameState = state; state->setNamedTimer(this); }
 		FrameState& getFrameState() const;
 
diff --git a/indra/llcommon/llfile.cpp b/indra/llcommon/llfile.cpp
index c51d042a3d..864b6e6975 100644..100755
--- a/indra/llcommon/llfile.cpp
+++ b/indra/llcommon/llfile.cpp
@@ -56,6 +56,8 @@ std::string strerr(int errn)
 	return buffer;
 }
 
+typedef std::basic_ios<char,std::char_traits < char > > _Myios;
+
 #else
 // On Posix we want to call strerror_r(), but alarmingly, there are two
 // different variants. The one that returns int always populates the passed
@@ -324,9 +326,10 @@ const char *LLFile::tmpdir()
 
 /***************** Modified file stream created to overcome the incorrect behaviour of posix fopen in windows *******************/
 
-#if USE_LLFILESTREAMS
+#if LL_WINDOWS
 
-LLFILE *	LLFile::_Fiopen(const std::string& filename, std::ios::openmode mode,int)	// protection currently unused
+LLFILE *	LLFile::_Fiopen(const std::string& filename, 
+		std::ios::openmode mode)
 {	// open a file
 	static const char *mods[] =
 	{	// fopen mode strings corresponding to valid[i]
@@ -385,117 +388,690 @@ LLFILE *	LLFile::_Fiopen(const std::string& filename, std::ios::openmode mode,in
 	return (0);
 }
 
-/************** input file stream ********************************/
+#endif /* LL_WINDOWS */
 
-void llifstream::close()
-{	// close the C stream
-	if (_Filebuffer && _Filebuffer->close() == 0)
+/************** llstdio file buffer ********************************/
+
+
+//llstdio_filebuf* llstdio_filebuf::open(const char *_Filename,
+//	ios_base::openmode _Mode)
+//{
+//#if LL_WINDOWS
+//	_Filet *_File;
+//	if (is_open() || (_File = LLFILE::_Fiopen(_Filename, _Mode)) == 0)
+//		return (0);	// open failed
+//
+//	_Init(_File, _Openfl);
+//	_Initcvt(&_USE(_Mysb::getloc(), _Cvt));
+//	return (this);	// open succeeded
+//#else
+//	std::filebuf* _file = std::filebuf::open(_Filename, _Mode);
+//	if (NULL == _file) return NULL;
+//	return this;
+//#endif
+//}
+
+
+// *TODO: Seek the underlying c stream for better cross-platform compatibility?
+#if !LL_WINDOWS
+llstdio_filebuf::int_type llstdio_filebuf::overflow(llstdio_filebuf::int_type __c)
+{
+	int_type __ret = traits_type::eof();
+	const bool __testeof = traits_type::eq_int_type(__c, __ret);
+	const bool __testout = _M_mode & ios_base::out;
+	if (__testout && !_M_reading)
 	{
-		_Myios::setstate(ios_base::failbit);	/*Flawfinder: ignore*/
+		if (this->pbase() < this->pptr())
+		{
+			// If appropriate, append the overflow char.
+			if (!__testeof)
+			{
+				*this->pptr() = traits_type::to_char_type(__c);
+				this->pbump(1);
+			}
+
+			// Convert pending sequence to external representation,
+			// and output.
+			if (_convert_to_external(this->pbase(),
+					 this->pptr() - this->pbase()))
+			{
+				_M_set_buffer(0);
+				__ret = traits_type::not_eof(__c);
+			}
+		}
+		else if (_M_buf_size > 1)
+		{
+			// Overflow in 'uncommitted' mode: set _M_writing, set
+			// the buffer to the initial 'write' mode, and put __c
+			// into the buffer.
+			_M_set_buffer(0);
+			_M_writing = true;
+			if (!__testeof)
+			{
+				*this->pptr() = traits_type::to_char_type(__c);
+				this->pbump(1);
+			}
+			__ret = traits_type::not_eof(__c);
+		}
+		else
+		{
+			// Unbuffered.
+			char_type __conv = traits_type::to_char_type(__c);
+			if (__testeof || _convert_to_external(&__conv, 1))
+			{
+				_M_writing = true;
+				__ret = traits_type::not_eof(__c);
+			}
+		}
 	}
+	return __ret;
 }
 
-void llifstream::open(const std::string& _Filename,	/* Flawfinder: ignore */
-	ios_base::openmode _Mode,
-	int _Prot)
-{	// open a C stream with specified mode
+bool llstdio_filebuf::_convert_to_external(char_type* __ibuf,
+						std::streamsize __ilen)
+{
+	// Sizes of external and pending output.
+	streamsize __elen;
+	streamsize __plen;
+	if (__check_facet(_M_codecvt).always_noconv())
+	{
+		//__elen = _M_file.xsputn(reinterpret_cast<char*>(__ibuf), __ilen);
+		__elen = fwrite(reinterpret_cast<void*>(__ibuf), 1,
+						__ilen, _M_file.file());
+		__plen = __ilen;
+	}
+	else
+	{
+		// Worst-case number of external bytes needed.
+		// XXX Not done encoding() == -1.
+		streamsize __blen = __ilen * _M_codecvt->max_length();
+		char* __buf = static_cast<char*>(__builtin_alloca(__blen));
 
-	LLFILE* filep = LLFile::_Fiopen(_Filename,_Mode | ios_base::in, _Prot);
-	if(filep == NULL)
+		char* __bend;
+		const char_type* __iend;
+		codecvt_base::result __r;
+		__r = _M_codecvt->out(_M_state_cur, __ibuf, __ibuf + __ilen,
+				__iend, __buf, __buf + __blen, __bend);
+
+		if (__r == codecvt_base::ok || __r == codecvt_base::partial)
+			__blen = __bend - __buf;
+		else if (__r == codecvt_base::noconv)
+		{
+			// Same as the always_noconv case above.
+			__buf = reinterpret_cast<char*>(__ibuf);
+			__blen = __ilen;
+		}
+		else
+			__throw_ios_failure(__N("llstdio_filebuf::_convert_to_external "
+									"conversion error"));
+  
+		//__elen = _M_file.xsputn(__buf, __blen);
+		__elen = fwrite(__buf, 1, __blen, _M_file.file());
+		__plen = __blen;
+
+		// Try once more for partial conversions.
+		if (__r == codecvt_base::partial && __elen == __plen)
+		{
+			const char_type* __iresume = __iend;
+			streamsize __rlen = this->pptr() - __iend;
+			__r = _M_codecvt->out(_M_state_cur, __iresume,
+					__iresume + __rlen, __iend, __buf,
+					__buf + __blen, __bend);
+			if (__r != codecvt_base::error)
+			{
+				__rlen = __bend - __buf;
+				//__elen = _M_file.xsputn(__buf, __rlen);
+				__elen = fwrite(__buf, 1, __rlen, _M_file.file());
+				__plen = __rlen;
+			}
+			else
+			{
+				__throw_ios_failure(__N("llstdio_filebuf::_convert_to_external "
+										"conversion error"));
+			}
+		}
+	}
+	return __elen == __plen;
+}
+
+llstdio_filebuf::int_type llstdio_filebuf::underflow()
+{
+	int_type __ret = traits_type::eof();
+	const bool __testin = _M_mode & ios_base::in;
+	if (__testin)
 	{
-		_Myios::setstate(ios_base::failbit);	/*Flawfinder: ignore*/
-		return;
+		if (_M_writing)
+		{
+			if (overflow() == traits_type::eof())
+			return __ret;
+			//_M_set_buffer(-1);
+			//_M_writing = false;
+		}
+		// Check for pback madness, and if so switch back to the
+		// normal buffers and jet outta here before expensive
+		// fileops happen...
+		_M_destroy_pback();
+
+		if (this->gptr() < this->egptr())
+			return traits_type::to_int_type(*this->gptr());
+
+		// Get and convert input sequence.
+		const size_t __buflen = _M_buf_size > 1 ? _M_buf_size - 1 : 1;
+
+		// Will be set to true if ::fread() returns 0 indicating EOF.
+		bool __got_eof = false;
+		// Number of internal characters produced.
+		streamsize __ilen = 0;
+		codecvt_base::result __r = codecvt_base::ok;
+		if (__check_facet(_M_codecvt).always_noconv())
+		{
+			//__ilen = _M_file.xsgetn(reinterpret_cast<char*>(this->eback()),
+			//			__buflen);
+			__ilen = fread(reinterpret_cast<void*>(this->eback()), 1,
+						__buflen, _M_file.file());
+			if (__ilen == 0)
+				__got_eof = true;
+		}
+		else
+	    {
+			// Worst-case number of external bytes.
+			// XXX Not done encoding() == -1.
+			const int __enc = _M_codecvt->encoding();
+			streamsize __blen; // Minimum buffer size.
+			streamsize __rlen; // Number of chars to read.
+			if (__enc > 0)
+				__blen = __rlen = __buflen * __enc;
+			else
+			{
+				__blen = __buflen + _M_codecvt->max_length() - 1;
+				__rlen = __buflen;
+			}
+			const streamsize __remainder = _M_ext_end - _M_ext_next;
+			__rlen = __rlen > __remainder ? __rlen - __remainder : 0;
+
+			// An imbue in 'read' mode implies first converting the external
+			// chars already present.
+			if (_M_reading && this->egptr() == this->eback() && __remainder)
+				__rlen = 0;
+
+			// Allocate buffer if necessary and move unconverted
+			// bytes to front.
+			if (_M_ext_buf_size < __blen)
+			{
+				char* __buf = new char[__blen];
+				if (__remainder)
+					__builtin_memcpy(__buf, _M_ext_next, __remainder);
+
+				delete [] _M_ext_buf;
+				_M_ext_buf = __buf;
+				_M_ext_buf_size = __blen;
+			}
+			else if (__remainder)
+				__builtin_memmove(_M_ext_buf, _M_ext_next, __remainder);
+
+			_M_ext_next = _M_ext_buf;
+			_M_ext_end = _M_ext_buf + __remainder;
+			_M_state_last = _M_state_cur;
+
+			do
+			{
+				if (__rlen > 0)
+				{
+					// Sanity check!
+					// This may fail if the return value of
+					// codecvt::max_length() is bogus.
+					if (_M_ext_end - _M_ext_buf + __rlen > _M_ext_buf_size)
+					{
+						__throw_ios_failure(__N("llstdio_filebuf::underflow "
+							"codecvt::max_length() "
+							"is not valid"));
+					}
+					//streamsize __elen = _M_file.xsgetn(_M_ext_end, __rlen);
+					streamsize __elen = fread(_M_ext_end, 1,
+						__rlen, _M_file.file());
+					if (__elen == 0)
+						__got_eof = true;
+					else if (__elen == -1)
+					break;
+					//_M_ext_end += __elen;
+				}
+
+				char_type* __iend = this->eback();
+				if (_M_ext_next < _M_ext_end)
+				{
+					__r = _M_codecvt->in(_M_state_cur, _M_ext_next,
+							_M_ext_end, _M_ext_next,
+							this->eback(),
+							this->eback() + __buflen, __iend);
+				}
+				if (__r == codecvt_base::noconv)
+				{
+					size_t __avail = _M_ext_end - _M_ext_buf;
+					__ilen = std::min(__avail, __buflen);
+					traits_type::copy(this->eback(),
+						reinterpret_cast<char_type*>
+						(_M_ext_buf), __ilen);
+					_M_ext_next = _M_ext_buf + __ilen;
+				}
+				else
+					__ilen = __iend - this->eback();
+
+				// _M_codecvt->in may return error while __ilen > 0: this is
+				// ok, and actually occurs in case of mixed encodings (e.g.,
+				// XML files).
+				if (__r == codecvt_base::error)
+					break;
+
+				__rlen = 1;
+			} while (__ilen == 0 && !__got_eof);
+		}
+
+		if (__ilen > 0)
+		{
+			_M_set_buffer(__ilen);
+			_M_reading = true;
+			__ret = traits_type::to_int_type(*this->gptr());
+		}
+		else if (__got_eof)
+		{
+			// If the actual end of file is reached, set 'uncommitted'
+			// mode, thus allowing an immediate write without an
+			// intervening seek.
+			_M_set_buffer(-1);
+			_M_reading = false;
+			// However, reaching it while looping on partial means that
+			// the file has got an incomplete character.
+			if (__r == codecvt_base::partial)
+				__throw_ios_failure(__N("llstdio_filebuf::underflow "
+					"incomplete character in file"));
+		}
+		else if (__r == codecvt_base::error)
+			__throw_ios_failure(__N("llstdio_filebuf::underflow "
+					"invalid byte sequence in file"));
+		else
+			__throw_ios_failure(__N("llstdio_filebuf::underflow "
+					"error reading the file"));
 	}
-	llassert(_Filebuffer == NULL);
-	_Filebuffer = new _Myfb(filep);
-	_ShouldClose = true;
-	_Myios::init(_Filebuffer);
+	return __ret;
 }
 
-bool llifstream::is_open() const
-{	// test if C stream has been opened
-	if(_Filebuffer)
-		return (_Filebuffer->is_open());
-	return false;
+std::streamsize llstdio_filebuf::xsgetn(char_type* __s, std::streamsize __n)
+{
+	// Clear out pback buffer before going on to the real deal...
+	streamsize __ret = 0;
+	if (_M_pback_init)
+	{
+		if (__n > 0 && this->gptr() == this->eback())
+		{
+			*__s++ = *this->gptr();
+			this->gbump(1);
+			__ret = 1;
+			--__n;
+		}
+		_M_destroy_pback();
+	}
+       
+	// Optimization in the always_noconv() case, to be generalized in the
+	// future: when __n > __buflen we read directly instead of using the
+	// buffer repeatedly.
+	const bool __testin = _M_mode & ios_base::in;
+	const streamsize __buflen = _M_buf_size > 1 ? _M_buf_size - 1 : 1;
+
+	if (__n > __buflen && __check_facet(_M_codecvt).always_noconv()
+		&& __testin && !_M_writing)
+	{
+		// First, copy the chars already present in the buffer.
+		const streamsize __avail = this->egptr() - this->gptr();
+		if (__avail != 0)
+		{
+			if (__avail == 1)
+				*__s = *this->gptr();
+			else
+				traits_type::copy(__s, this->gptr(), __avail);
+			__s += __avail;
+			this->gbump(__avail);
+			__ret += __avail;
+			__n -= __avail;
+		}
+
+		// Need to loop in case of short reads (relatively common
+		// with pipes).
+		streamsize __len;
+		for (;;)
+		{
+			//__len = _M_file.xsgetn(reinterpret_cast<char*>(__s), __n);
+			__len = fread(reinterpret_cast<void*>(__s), 1, 
+						__n, _M_file.file());
+			if (__len == -1)
+				__throw_ios_failure(__N("llstdio_filebuf::xsgetn "
+										"error reading the file"));
+			if (__len == 0)
+				break;
+
+			__n -= __len;
+			__ret += __len;
+			if (__n == 0)
+				break;
+
+			__s += __len;
+		}
+
+		if (__n == 0)
+		{
+			_M_set_buffer(0);
+			_M_reading = true;
+		}
+		else if (__len == 0)
+		{
+			// If end of file is reached, set 'uncommitted'
+			// mode, thus allowing an immediate write without
+			// an intervening seek.
+			_M_set_buffer(-1);
+			_M_reading = false;
+		}
+	}
+	else
+		__ret += __streambuf_type::xsgetn(__s, __n);
+
+	return __ret;
 }
-llifstream::~llifstream()
+
+std::streamsize llstdio_filebuf::xsputn(char_type* __s, std::streamsize __n)
 {
-	if (_ShouldClose)
+	// Optimization in the always_noconv() case, to be generalized in the
+	// future: when __n is sufficiently large we write directly instead of
+	// using the buffer.
+	streamsize __ret = 0;
+	const bool __testout = _M_mode & ios_base::out;
+	if (__check_facet(_M_codecvt).always_noconv()
+		&& __testout && !_M_reading)
 	{
-		close();
+		// Measurement would reveal the best choice.
+		const streamsize __chunk = 1ul << 10;
+		streamsize __bufavail = this->epptr() - this->pptr();
+
+		// Don't mistake 'uncommitted' mode buffered with unbuffered.
+		if (!_M_writing && _M_buf_size > 1)
+			__bufavail = _M_buf_size - 1;
+
+		const streamsize __limit = std::min(__chunk, __bufavail);
+		if (__n >= __limit)
+		{
+			const streamsize __buffill = this->pptr() - this->pbase();
+			const char* __buf = reinterpret_cast<const char*>(this->pbase());
+			//__ret = _M_file.xsputn_2(__buf, __buffill,
+			//			reinterpret_cast<const char*>(__s), __n);
+			if (__buffill)
+			{
+				__ret = fwrite(__buf, 1, __buffill, _M_file.file());
+			}
+			if (__ret == __buffill)
+			{
+				__ret += fwrite(reinterpret_cast<const char*>(__s), 1,
+								__n, _M_file.file());
+			}
+			if (__ret == __buffill + __n)
+			{
+				_M_set_buffer(0);
+				_M_writing = true;
+			}
+			if (__ret > __buffill)
+				__ret -= __buffill;
+			else
+				__ret = 0;
+		}
+		else
+			__ret = __streambuf_type::xsputn(__s, __n);
 	}
-	delete _Filebuffer;
+	else
+		__ret = __streambuf_type::xsputn(__s, __n);
+    return __ret;
 }
 
-llifstream::llifstream(const std::string& _Filename,
-	ios_base::openmode _Mode,
-	int _Prot)
-	: std::basic_istream< char , std::char_traits< char > >(NULL,true),_Filebuffer(NULL),_ShouldClose(false)
+int llstdio_filebuf::sync()
+{
+	return (_M_file.sync() == 0 ? 0 : -1);
+}
+#endif
+
+/************** input file stream ********************************/
+
 
-{	// construct with named file and specified mode
-	open(_Filename, _Mode | ios_base::in, _Prot);	/* Flawfinder: ignore */
+llifstream::llifstream() : _M_filebuf(),
+#if LL_WINDOWS
+	std::istream(&_M_filebuf) {}
+#else
+	std::istream()
+{
+	this->init(&_M_filebuf);
 }
+#endif
 
+// explicit
+llifstream::llifstream(const std::string& _Filename, 
+		ios_base::openmode _Mode) : _M_filebuf(),
+#if LL_WINDOWS
+	std::istream(&_M_filebuf)
+{
+	llutf16string wideName = utf8str_to_utf16str( _Filename );
+	if (_M_filebuf.open(wideName.c_str(), _Mode | ios_base::in) == 0)
+	{
+		_Myios::setstate(ios_base::failbit);
+	}
+}
+#else
+	std::istream()
+{
+	this->init(&_M_filebuf);
+	this->open(_Filename.c_str(), _Mode | ios_base::in);
+}
+#endif
 
-/************** output file stream ********************************/
+// explicit
+llifstream::llifstream(const char* _Filename, 
+		ios_base::openmode _Mode) : _M_filebuf(),
+#if LL_WINDOWS
+	std::istream(&_M_filebuf)
+{
+	llutf16string wideName = utf8str_to_utf16str( _Filename );
+	if (_M_filebuf.open(wideName.c_str(), _Mode | ios_base::in) == 0)
+	{
+		_Myios::setstate(ios_base::failbit);
+	}
+}
+#else
+	std::istream()
+{
+	this->init(&_M_filebuf);
+	this->open(_Filename, _Mode | ios_base::in);
+}
+#endif
 
-bool llofstream::is_open() const
+
+// explicit
+llifstream::llifstream(_Filet *_File,
+		ios_base::openmode _Mode, size_t _Size) :
+	_M_filebuf(_File, _Mode, _Size),
+#if LL_WINDOWS
+	std::istream(&_M_filebuf) {}
+#else
+	std::istream()
+{
+	this->init(&_M_filebuf);
+}
+#endif
+
+#if !LL_WINDOWS
+// explicit
+llifstream::llifstream(int __fd,
+		ios_base::openmode _Mode, size_t _Size) :
+	_M_filebuf(__fd, _Mode, _Size),
+	std::istream()
+{
+	this->init(&_M_filebuf);
+}
+#endif
+
+bool llifstream::is_open() const
 {	// test if C stream has been opened
-	if(_Filebuffer)
-		return (_Filebuffer->is_open());
-	return false;
+	return _M_filebuf.is_open();
 }
 
-void llofstream::open(const std::string& _Filename,	/* Flawfinder: ignore */
-	ios_base::openmode _Mode,
-	int _Prot)
+void llifstream::open(const char* _Filename, ios_base::openmode _Mode)
 {	// open a C stream with specified mode
 
-	LLFILE* filep = LLFile::_Fiopen(_Filename,_Mode | ios_base::out, _Prot);
-	if(filep == NULL)
+#if LL_WINDOWS
+	llutf16string wideName = utf8str_to_utf16str( _Filename );
+	if (_M_filebuf.open( wideName.c_str(), _Mode | ios_base::in) == 0)
+	{
+		_Myios::setstate(ios_base::failbit);
+	}
+	else
 	{
-		_Myios::setstate(ios_base::failbit);	/*Flawfinder: ignore*/
-		return;
+		_Myios::clear();
 	}
-	llassert(_Filebuffer==NULL);
-	_Filebuffer = new _Myfb(filep);
-	_ShouldClose = true;
-	_Myios::init(_Filebuffer);
+#else
+	if (_M_filebuf.open(_Filename, _Mode | ios_base::in) == 0)
+	{
+		this->setstate(ios_base::failbit);
+	}
+	else
+	{
+		this->clear();
+	}
+#endif
 }
 
-void llofstream::close()
+void llifstream::close()
 {	// close the C stream
-	if(is_open())
+	if (_M_filebuf.close() == 0)
 	{
-		if (_Filebuffer->close() == 0)
-		{
-			_Myios::setstate(ios_base::failbit);	/*Flawfinder: ignore*/
-		}
-		delete _Filebuffer;
-		_Filebuffer = NULL;
-		_ShouldClose = false;
+#if LL_WINDOWS
+		_Myios::setstate(ios_base::failbit);
+#else
+		this->setstate(ios_base::failbit);
+#endif
 	}
 }
 
+
+/************** output file stream ********************************/
+
+
+llofstream::llofstream() : _M_filebuf(),
+#if LL_WINDOWS
+	std::ostream(&_M_filebuf) {}
+#else
+	std::ostream()
+{
+	this->init(&_M_filebuf);
+}
+#endif
+
+// explicit
 llofstream::llofstream(const std::string& _Filename,
-	std::ios_base::openmode _Mode,
-	int _Prot)
-		: std::basic_ostream<char,std::char_traits < char > >(NULL,true),_Filebuffer(NULL),_ShouldClose(false)
-{	// construct with named file and specified mode
-	open(_Filename, _Mode , _Prot);	/* Flawfinder: ignore */
+		ios_base::openmode _Mode) : _M_filebuf(),
+#if LL_WINDOWS
+	std::ostream(&_M_filebuf)
+{
+	llutf16string wideName = utf8str_to_utf16str( _Filename );
+	if (_M_filebuf.open( wideName.c_str(), _Mode | ios_base::out) == 0)
+	{
+		_Myios::setstate(ios_base::failbit);
+	}
+}
+#else
+	std::ostream()
+{
+	this->init(&_M_filebuf);
+	this->open(_Filename.c_str(), _Mode | ios_base::out);
+}
+#endif
+
+// explicit
+llofstream::llofstream(const char* _Filename,
+		ios_base::openmode _Mode) : _M_filebuf(),
+#if LL_WINDOWS
+	std::ostream(&_M_filebuf)
+{
+	llutf16string wideName = utf8str_to_utf16str( _Filename );
+	if (_M_filebuf.open( wideName.c_str(), _Mode | ios_base::out) == 0)
+	{
+		_Myios::setstate(ios_base::failbit);
+	}
+}
+#else
+	std::ostream()
+{
+	this->init(&_M_filebuf);
+	this->open(_Filename, _Mode | ios_base::out);
+}
+#endif
+
+// explicit
+llofstream::llofstream(_Filet *_File,
+			ios_base::openmode _Mode, size_t _Size) :
+	_M_filebuf(_File, _Mode, _Size),
+#if LL_WINDOWS
+	std::ostream(&_M_filebuf) {}
+#else
+	std::ostream()
+{
+	this->init(&_M_filebuf);
 }
+#endif
 
-llofstream::~llofstream()
+#if !LL_WINDOWS
+// explicit
+llofstream::llofstream(int __fd,
+			ios_base::openmode _Mode, size_t _Size) :
+	_M_filebuf(__fd, _Mode, _Size),
+	std::ostream()
 {
-	// destroy the object
-	if (_ShouldClose)
+	this->init(&_M_filebuf);
+}
+#endif
+
+bool llofstream::is_open() const
+{	// test if C stream has been opened
+	return _M_filebuf.is_open();
+}
+
+void llofstream::open(const char* _Filename, ios_base::openmode _Mode)
+{	// open a C stream with specified mode
+#if LL_WINDOWS
+	llutf16string wideName = utf8str_to_utf16str( _Filename );
+	if (_M_filebuf.open( wideName.c_str(), _Mode | ios_base::out) == 0)
+	{
+		_Myios::setstate(ios_base::failbit);
+	}
+	else
 	{
-		close();
+		_Myios::clear();
 	}
-	delete _Filebuffer;
+#else
+	if (_M_filebuf.open(_Filename, _Mode | ios_base::out) == 0)
+	{
+		this->setstate(ios_base::failbit);
+	}
+	else
+	{
+		this->clear();
+	}
+#endif
 }
 
-#endif // #if USE_LLFILESTREAMS
+void llofstream::close()
+{	// close the C stream
+	if (_M_filebuf.close() == 0)
+	{
+#if LL_WINDOWS
+		_Myios::setstate(ios_base::failbit);
+#else
+		this->setstate(ios_base::failbit);
+#endif
+	}
+}
 
 /************** helper functions ********************************/
 
diff --git a/indra/llcommon/llfile.h b/indra/llcommon/llfile.h
index dd7d36513a..9d70db96ea 100644..100755
--- a/indra/llcommon/llfile.h
+++ b/indra/llcommon/llfile.h
@@ -35,16 +35,9 @@
  * Attempts to mostly mirror the POSIX style IO functions.
  */
 
-typedef FILE	LLFILE;
+typedef FILE LLFILE;
 
 #include <fstream>
-
-#ifdef LL_WINDOWS
-#define	USE_LLFILESTREAMS	1
-#else
-#define	USE_LLFILESTREAMS	0
-#endif
-
 #include <sys/stat.h>
 
 #if LL_WINDOWS
@@ -52,6 +45,8 @@ typedef FILE	LLFILE;
 typedef struct _stat	llstat;
 #else
 typedef struct stat		llstat;
+#include <ext/stdio_filebuf.h>
+#include <bits/postypes.h>
 #endif
 
 #ifndef S_ISREG
@@ -83,142 +78,342 @@ public:
 	static	int		stat(const std::string&	filename,llstat*	file_status);
 	static	bool	isdir(const std::string&	filename);
 	static	bool	isfile(const std::string&	filename);
-	static	LLFILE *	_Fiopen(const std::string& filename, std::ios::openmode mode,int);	// protection currently unused
+	static	LLFILE *	_Fiopen(const std::string& filename, 
+			std::ios::openmode mode);
 
 	static  const char * tmpdir();
 };
 
+/**
+ *  @brief Provides a layer of compatibility for C/POSIX.
+ *
+ *  This is taken from both the GNU __gnu_cxx::stdio_filebuf extension and 
+ *  VC's basic_filebuf implementation.
+ *  This file buffer provides extensions for working with standard C FILE*'s 
+ *  and POSIX file descriptors for platforms that support this.
+*/
+namespace
+{
+#if LL_WINDOWS
+typedef std::filebuf						_Myfb;
+#else
+typedef  __gnu_cxx::stdio_filebuf< char >	_Myfb;
+typedef std::__c_file						_Filet;
+#endif /* LL_WINDOWS */
+}
 
-#if USE_LLFILESTREAMS
-
-class LL_COMMON_API llifstream	:	public	std::basic_istream < char , std::char_traits < char > >
+class LL_COMMON_API llstdio_filebuf : public _Myfb
 {
-	// input stream associated with a C stream
 public:
-	typedef std::basic_ifstream<char,std::char_traits < char > > _Myt;
-	typedef std::basic_filebuf<char,std::char_traits< char > > _Myfb;
-	typedef std::basic_ios<char,std::char_traits< char > > _Myios;
-
-	llifstream()
-		: std::basic_istream<char,std::char_traits< char > >(NULL,true),_Filebuffer(NULL),_ShouldClose(false)
-	{	// construct unopened
-	}
+	/**
+	 * deferred initialization / destruction
+	*/
+	llstdio_filebuf() : _Myfb() {}
+	virtual ~llstdio_filebuf() {} 
+
+	/**
+	 *  @param  f  An open @c FILE*.
+	 *  @param  mode  Same meaning as in a standard filebuf.
+	 *  @param  size  Optimal or preferred size of internal buffer, in chars.
+	 *                Defaults to system's @c BUFSIZ.
+	 *
+	 *  This constructor associates a file stream buffer with an open
+	 *  C @c FILE*.  The @c FILE* will not be automatically closed when the
+	 *  stdio_filebuf is closed/destroyed.
+	*/
+	llstdio_filebuf(_Filet* __f, std::ios_base::openmode __mode,
+		    //size_t __size = static_cast<size_t>(BUFSIZ)) :
+		    size_t __size = static_cast<size_t>(1)) :
+#if LL_WINDOWS
+		_Myfb(__f) {}
+#else
+		_Myfb(__f, __mode, __size) {}
+#endif
 
-	explicit llifstream(const std::string& _Filename,
-		ios_base::openmode _Mode = ios_base::in,
-		int _Prot = (int)ios_base::_Openprot);
-
-	explicit llifstream(_Filet *_File)
-		: std::basic_istream<char,std::char_traits< char > >(NULL,true),
-			_Filebuffer(new _Myfb(_File)),
-			_ShouldClose(false)
-	{	// construct with specified C stream
-	}
-	virtual ~llifstream();
-
-	_Myfb *rdbuf() const
-	{	// return pointer to file buffer
-		return _Filebuffer;
-	}
-	bool is_open() const;
-	void open(const std::string& _Filename,	/* Flawfinder: ignore */
-		ios_base::openmode _Mode = ios_base::in,
-		int _Prot = (int)ios_base::_Openprot);	
-	void close();
+	/**
+	 *  @brief  Opens an external file.
+	 *  @param  s  The name of the file.
+	 *  @param  mode  The open mode flags.
+	 *  @return  @c this on success, NULL on failure
+	 *
+	 *  If a file is already open, this function immediately fails.
+	 *  Otherwise it tries to open the file named @a s using the flags
+	 *  given in @a mode.
+	*/
+	//llstdio_filebuf* open(const char *_Filename,
+	//		std::ios_base::openmode _Mode);
+
+	/**
+	 *  @param  fd  An open file descriptor.
+	 *  @param  mode  Same meaning as in a standard filebuf.
+	 *  @param  size  Optimal or preferred size of internal buffer, in chars.
+	 *
+	 *  This constructor associates a file stream buffer with an open
+	 *  POSIX file descriptor. The file descriptor will be automatically
+	 *  closed when the stdio_filebuf is closed/destroyed.
+	*/
+#if !LL_WINDOWS
+	llstdio_filebuf(int __fd, std::ios_base::openmode __mode,
+		//size_t __size = static_cast<size_t>(BUFSIZ)) :
+		size_t __size = static_cast<size_t>(1)) :
+		_Myfb(__fd, __mode, __size) {}
+#endif
 
-private:
-	_Myfb* _Filebuffer;	// the file buffer
-	bool _ShouldClose;
+// *TODO: Seek the underlying c stream for better cross-platform compatibility?
+#if !LL_WINDOWS
+protected:
+	/** underflow() and uflow() functions are called to get the next
+	 *  character from the real input source when the buffer is empty.
+	 *  Buffered input uses underflow()
+	*/
+	/*virtual*/ int_type underflow();
+
+	/*  Convert internal byte sequence to external, char-based
+	 * sequence via codecvt.
+	*/
+	bool _convert_to_external(char_type*, std::streamsize);
+
+	/** The overflow() function is called to transfer characters to the
+	 *  real output destination when the buffer is full. A call to
+	 *  overflow(c) outputs the contents of the buffer plus the
+	 *  character c.
+	 *  Consume some sequence of the characters in the pending sequence.
+	*/
+	/*virtual*/ int_type overflow(int_type __c = traits_type::eof());
+
+	/** sync() flushes the underlying @c FILE* stream.
+	*/
+	/*virtual*/ int sync();
+
+	std::streamsize xsgetn(char_type*, std::streamsize);
+	std::streamsize xsputn(char_type*, std::streamsize);
+#endif
 };
 
 
-class LL_COMMON_API llofstream	:	public	std::basic_ostream< char , std::char_traits < char > >
+/**
+ *  @brief  Controlling input for files.
+ *
+ *  This class supports reading from named files, using the inherited
+ *  functions from std::basic_istream.  To control the associated
+ *  sequence, an instance of std::basic_filebuf (or a platform-specific derivative)
+ *  which allows construction using a pre-exisintg file stream buffer. 
+ *  We refer to this std::basic_filebuf (or derivative) as @c sb.
+*/
+class LL_COMMON_API llifstream	:	public	std::istream
 {
+	// input stream associated with a C stream
 public:
-	typedef std::basic_ostream< char , std::char_traits < char > > _Myt;
-	typedef std::basic_filebuf< char , std::char_traits < char > > _Myfb;
-	typedef std::basic_ios<char,std::char_traits < char > > _Myios;
-
-	llofstream()
-		: std::basic_ostream<char,std::char_traits < char > >(NULL,true),_Filebuffer(NULL),_ShouldClose(false)
-	{	// construct unopened
-	}
-
-	explicit llofstream(const std::string& _Filename,
-		std::ios_base::openmode _Mode = ios_base::out,
-		int _Prot = (int)std::ios_base::_Openprot);
-	
-
-	explicit llofstream(_Filet *_File)
-		: std::basic_ostream<char,std::char_traits < char > >(NULL,true),
-			_Filebuffer(new _Myfb(_File)),//_File)
-			_ShouldClose(false)
-	{	// construct with specified C stream
-	}
-
-	virtual ~llofstream();
-
-	_Myfb *rdbuf() const
-	{	// return pointer to file buffer
-		return _Filebuffer;
-	}
+	// Constructors:
+	/**
+	 *  @brief  Default constructor.
+	 *
+	 *  Initializes @c sb using its default constructor, and passes
+	 *  @c &sb to the base class initializer.  Does not open any files
+	 *  (you haven't given it a filename to open).
+	*/
+	llifstream();
+
+	/**
+	 *  @brief  Create an input file stream.
+	 *  @param  Filename  String specifying the filename.
+	 *  @param  Mode  Open file in specified mode (see std::ios_base).
+	 *
+     *  @c ios_base::in is automatically included in @a mode.
+	*/
+	explicit llifstream(const std::string& _Filename,
+			ios_base::openmode _Mode = ios_base::in);
+	explicit llifstream(const char* _Filename,
+			ios_base::openmode _Mode = ios_base::in);
+
+	/**
+	 *  @brief  Create a stream using an open c file stream.
+	 *  @param  File  An open @c FILE*.
+        @param  Mode  Same meaning as in a standard filebuf.
+        @param  Size  Optimal or preferred size of internal buffer, in chars.
+                      Defaults to system's @c BUFSIZ.
+	*/
+	explicit llifstream(_Filet *_File,
+			ios_base::openmode _Mode = ios_base::in,
+			//size_t _Size = static_cast<size_t>(BUFSIZ));
+			size_t _Size = static_cast<size_t>(1));
+
+	/**
+	 *  @brief  Create a stream using an open file descriptor.
+	 *  @param  fd    An open file descriptor.
+        @param  Mode  Same meaning as in a standard filebuf.
+        @param  Size  Optimal or preferred size of internal buffer, in chars.
+                      Defaults to system's @c BUFSIZ.
+	*/
+#if !LL_WINDOWS
+	explicit llifstream(int __fd,
+			ios_base::openmode _Mode = ios_base::in,
+			//size_t _Size = static_cast<size_t>(BUFSIZ));
+			size_t _Size = static_cast<size_t>(1));
+#endif
 
+	/**
+	 *  @brief  The destructor does nothing.
+	 *
+	 *  The file is closed by the filebuf object, not the formatting
+	 *  stream.
+	*/
+	virtual ~llifstream() {}
+
+	// Members:
+	/**
+	 *  @brief  Accessing the underlying buffer.
+	 *  @return  The current basic_filebuf buffer.
+	 *
+	 *  This hides both signatures of std::basic_ios::rdbuf().
+	*/
+	llstdio_filebuf* rdbuf() const
+	{ return const_cast<llstdio_filebuf*>(&_M_filebuf); }
+
+	/**
+	 *  @brief  Wrapper to test for an open file.
+	 *  @return  @c rdbuf()->is_open()
+	*/
 	bool is_open() const;
 
-	void open(const std::string& _Filename,ios_base::openmode _Mode = ios_base::out,int _Prot = (int)ios_base::_Openprot);	/* Flawfinder: ignore */
-
+	/**
+	 *  @brief  Opens an external file.
+	 *  @param  Filename  The name of the file.
+	 *  @param  Node  The open mode flags.
+	 *
+	 *  Calls @c llstdio_filebuf::open(s,mode|in).  If that function
+	 *  fails, @c failbit is set in the stream's error state.
+	*/
+	void open(const std::string& _Filename,
+			ios_base::openmode _Mode = ios_base::in)
+	{ open(_Filename.c_str(), _Mode); }
+	void open(const char* _Filename,
+			ios_base::openmode _Mode = ios_base::in);
+
+	/**
+	 *  @brief  Close the file.
+	 *
+	 *  Calls @c llstdio_filebuf::close().  If that function
+	 *  fails, @c failbit is set in the stream's error state.
+	*/
 	void close();
 
 private:
-	_Myfb *_Filebuffer;	// the file buffer
-	bool _ShouldClose;
-};
-
-
-
-#else
-//Use standard file streams on non windows platforms
-//#define	llifstream	std::ifstream
-//#define	llofstream	std::ofstream
-
-class LL_COMMON_API llifstream	:	public	std::ifstream
-{
-public:
-	llifstream() : std::ifstream()
-	{
-	}
-
-	explicit llifstream(const std::string& _Filename, std::_Ios_Openmode _Mode = in)
-		: std::ifstream(_Filename.c_str(), _Mode)
-	{
-	}
-	void open(const std::string& _Filename, std::_Ios_Openmode _Mode = in)	/* Flawfinder: ignore */
-	{
-		std::ifstream::open(_Filename.c_str(), _Mode);
-	}
+	llstdio_filebuf _M_filebuf;
 };
 
 
-class LL_COMMON_API llofstream	:	public	std::ofstream
+/**
+ *  @brief  Controlling output for files.
+ *
+ *  This class supports writing to named files, using the inherited
+ *  functions from std::basic_ostream.  To control the associated
+ *  sequence, an instance of std::basic_filebuf (or a platform-specific derivative)
+ *  which allows construction using a pre-exisintg file stream buffer. 
+ *  We refer to this std::basic_filebuf (or derivative) as @c sb.
+*/
+class LL_COMMON_API llofstream	:	public	std::ostream
 {
 public:
-	llofstream() : std::ofstream()
-	{
-	}
+	// Constructors:
+	/**
+	 *  @brief  Default constructor.
+	 *
+	 *  Initializes @c sb using its default constructor, and passes
+	 *  @c &sb to the base class initializer.  Does not open any files
+	 *  (you haven't given it a filename to open).
+	*/
+	llofstream();
+
+	/**
+	 *  @brief  Create an output file stream.
+	 *  @param  Filename  String specifying the filename.
+	 *  @param  Mode  Open file in specified mode (see std::ios_base).
+	 *
+	 *  @c ios_base::out|ios_base::trunc is automatically included in
+	 *  @a mode.
+	*/
+	explicit llofstream(const std::string& _Filename,
+			ios_base::openmode _Mode = ios_base::out|ios_base::trunc);
+	explicit llofstream(const char* _Filename,
+			ios_base::openmode _Mode = ios_base::out|ios_base::trunc);
+
+	/**
+	 *  @brief  Create a stream using an open c file stream.
+	 *  @param  File  An open @c FILE*.
+        @param  Mode  Same meaning as in a standard filebuf.
+        @param  Size  Optimal or preferred size of internal buffer, in chars.
+                      Defaults to system's @c BUFSIZ.
+	*/
+	explicit llofstream(_Filet *_File,
+			ios_base::openmode _Mode = ios_base::out,
+			//size_t _Size = static_cast<size_t>(BUFSIZ));
+			size_t _Size = static_cast<size_t>(1));
+
+	/**
+	 *  @brief  Create a stream using an open file descriptor.
+	 *  @param  fd    An open file descriptor.
+        @param  Mode  Same meaning as in a standard filebuf.
+        @param  Size  Optimal or preferred size of internal buffer, in chars.
+                      Defaults to system's @c BUFSIZ.
+	*/
+#if !LL_WINDOWS
+	explicit llofstream(int __fd,
+			ios_base::openmode _Mode = ios_base::out,
+			//size_t _Size = static_cast<size_t>(BUFSIZ));
+			size_t _Size = static_cast<size_t>(1));
+#endif
 
-	explicit llofstream(const std::string& _Filename, std::_Ios_Openmode _Mode = out)
-		: std::ofstream(_Filename.c_str(), _Mode)
-	{
-	}
+	/**
+	 *  @brief  The destructor does nothing.
+	 *
+	 *  The file is closed by the filebuf object, not the formatting
+	 *  stream.
+	*/
+	virtual ~llofstream() {}
+
+	// Members:
+	/**
+	 *  @brief  Accessing the underlying buffer.
+	 *  @return  The current basic_filebuf buffer.
+	 *
+	 *  This hides both signatures of std::basic_ios::rdbuf().
+	*/
+	llstdio_filebuf* rdbuf() const
+	{ return const_cast<llstdio_filebuf*>(&_M_filebuf); }
+
+	/**
+	 *  @brief  Wrapper to test for an open file.
+	 *  @return  @c rdbuf()->is_open()
+	*/
+	bool is_open() const;
 
-	void open(const std::string& _Filename, std::_Ios_Openmode _Mode = out)	/* Flawfinder: ignore */
-	{
-		std::ofstream::open(_Filename.c_str(), _Mode);
-	}
+	/**
+	 *  @brief  Opens an external file.
+	 *  @param  Filename  The name of the file.
+	 *  @param  Node  The open mode flags.
+	 *
+	 *  Calls @c llstdio_filebuf::open(s,mode|out).  If that function
+	 *  fails, @c failbit is set in the stream's error state.
+	*/
+	void open(const std::string& _Filename,
+			ios_base::openmode _Mode = ios_base::out|ios_base::trunc)
+	{ open(_Filename.c_str(), _Mode); }
+	void open(const char* _Filename,
+			ios_base::openmode _Mode = ios_base::out|ios_base::trunc);
+
+	/**
+	 *  @brief  Close the file.
+	 *
+	 *  Calls @c llstdio_filebuf::close().  If that function
+	 *  fails, @c failbit is set in the stream's error state.
+	*/
+	void close();
 
+private:
+	llstdio_filebuf _M_filebuf;
 };
 
-#endif
 
 /**
  * @breif filesize helpers.
diff --git a/indra/llcommon/llfindlocale.cpp b/indra/llcommon/llfindlocale.cpp
index cd7c0c7c09..cd7c0c7c09 100644..100755
--- a/indra/llcommon/llfindlocale.cpp
+++ b/indra/llcommon/llfindlocale.cpp
diff --git a/indra/llcommon/llfindlocale.h b/indra/llcommon/llfindlocale.h
index 6770db5774..6770db5774 100644..100755
--- a/indra/llcommon/llfindlocale.h
+++ b/indra/llcommon/llfindlocale.h
diff --git a/indra/llcommon/llfixedbuffer.cpp b/indra/llcommon/llfixedbuffer.cpp
index d394f179fb..d394f179fb 100644..100755
--- a/indra/llcommon/llfixedbuffer.cpp
+++ b/indra/llcommon/llfixedbuffer.cpp
diff --git a/indra/llcommon/llfixedbuffer.h b/indra/llcommon/llfixedbuffer.h
index 554cf48a4c..554cf48a4c 100644..100755
--- a/indra/llcommon/llfixedbuffer.h
+++ b/indra/llcommon/llfixedbuffer.h
diff --git a/indra/llcommon/llfoldertype.cpp b/indra/llcommon/llfoldertype.cpp
index f6d0f5bce8..f6d0f5bce8 100644..100755
--- a/indra/llcommon/llfoldertype.cpp
+++ b/indra/llcommon/llfoldertype.cpp
diff --git a/indra/llcommon/llfoldertype.h b/indra/llcommon/llfoldertype.h
index a0c847914f..a0c847914f 100644..100755
--- a/indra/llcommon/llfoldertype.h
+++ b/indra/llcommon/llfoldertype.h
diff --git a/indra/llcommon/llformat.cpp b/indra/llcommon/llformat.cpp
index 3b2b3038ea..3b2b3038ea 100644..100755
--- a/indra/llcommon/llformat.cpp
+++ b/indra/llcommon/llformat.cpp
diff --git a/indra/llcommon/llformat.h b/indra/llcommon/llformat.h
index a4ec5e01de..a4ec5e01de 100644..100755
--- a/indra/llcommon/llformat.h
+++ b/indra/llcommon/llformat.h
diff --git a/indra/llcommon/llframetimer.cpp b/indra/llcommon/llframetimer.cpp
index ec64195b21..ec64195b21 100644..100755
--- a/indra/llcommon/llframetimer.cpp
+++ b/indra/llcommon/llframetimer.cpp
diff --git a/indra/llcommon/llframetimer.h b/indra/llcommon/llframetimer.h
index 45754f3785..45754f3785 100644..100755
--- a/indra/llcommon/llframetimer.h
+++ b/indra/llcommon/llframetimer.h
diff --git a/indra/llcommon/llhandle.h b/indra/llcommon/llhandle.h
index 6af5e198d6..401e4d759a 100644..100755
--- a/indra/llcommon/llhandle.h
+++ b/indra/llcommon/llhandle.h
@@ -194,13 +194,6 @@ public:
 		return mHandle; 
 	}
 
-protected:
-	typedef LLHandle<T> handle_type_t;
-	LLHandleProvider() 
-	{
-		// provided here to enforce T deriving from LLHandleProvider<T>
-	} 
-
 	template <typename U>
 	LLHandle<U> getDerivedHandle(typename boost::enable_if< typename boost::is_convertible<U*, T*> >::type* dummy = 0) const
 	{
@@ -209,6 +202,12 @@ protected:
 		return downcast_handle;
 	}
 
+protected:
+	typedef LLHandle<T> handle_type_t;
+	LLHandleProvider() 
+	{
+		// provided here to enforce T deriving from LLHandleProvider<T>
+	} 
 
 private:
 	mutable LLRootHandle<T> mHandle;
diff --git a/indra/llcommon/llhash.h b/indra/llcommon/llhash.h
index c077ebe93f..c077ebe93f 100644..100755
--- a/indra/llcommon/llhash.h
+++ b/indra/llcommon/llhash.h
diff --git a/indra/llcommon/llheartbeat.cpp b/indra/llcommon/llheartbeat.cpp
index 18a0c489bd..18a0c489bd 100644..100755
--- a/indra/llcommon/llheartbeat.cpp
+++ b/indra/llcommon/llheartbeat.cpp
diff --git a/indra/llcommon/llheartbeat.h b/indra/llcommon/llheartbeat.h
index 4a75fcc103..4a75fcc103 100644..100755
--- a/indra/llcommon/llheartbeat.h
+++ b/indra/llcommon/llheartbeat.h
diff --git a/indra/llcommon/llhttpstatuscodes.h b/indra/llcommon/llhttpstatuscodes.h
index 0173461dad..0173461dad 100644..100755
--- a/indra/llcommon/llhttpstatuscodes.h
+++ b/indra/llcommon/llhttpstatuscodes.h
diff --git a/indra/llcommon/llindexedqueue.h b/indra/llcommon/llindexedqueue.h
index aa2675d87d..aa2675d87d 100644..100755
--- a/indra/llcommon/llindexedqueue.h
+++ b/indra/llcommon/llindexedqueue.h
diff --git a/indra/llcommon/llinitparam.cpp b/indra/llcommon/llinitparam.cpp
index db72aa19b9..89c831d296 100644..100755
--- a/indra/llcommon/llinitparam.cpp
+++ b/indra/llcommon/llinitparam.cpp
@@ -40,7 +40,9 @@ namespace LLInitParam
 	{
 		const U8* my_addr = reinterpret_cast<const U8*>(this);
 		const U8* block_addr = reinterpret_cast<const U8*>(enclosing_block);
-		mEnclosingBlockOffset = 0x7FFFffff & (U32)(my_addr - block_addr);
+		U32 enclosing_block_offset = 0x7FFFffff & (U32)(my_addr - block_addr);
+		mEnclosingBlockOffsetLow = enclosing_block_offset & 0x0000ffff;
+		mEnclosingBlockOffsetHigh = (enclosing_block_offset & 0x007f0000) >> 16;
 	}
 
 	//
@@ -112,6 +114,35 @@ namespace LLInitParam
 		std::copy(src_block_data.mAllParams.begin(), src_block_data.mAllParams.end(), std::back_inserter(mAllParams));
 	}
 
+	void BlockDescriptor::addParam(const ParamDescriptorPtr in_param, const char* char_name)
+	{
+		// create a copy of the param descriptor in mAllParams
+		// so other data structures can store a pointer to it
+		mAllParams.push_back(in_param);
+		ParamDescriptorPtr param(mAllParams.back());
+
+		std::string name(char_name);
+		if ((size_t)param->mParamHandle > mMaxParamOffset)
+		{
+			llerrs << "Attempted to register param with block defined for parent class, make sure to derive from LLInitParam::Block<YOUR_CLASS, PARAM_BLOCK_BASE_CLASS>" << llendl;
+		}
+
+		if (name.empty())
+		{
+			mUnnamedParams.push_back(param);
+		}
+		else
+		{
+			// don't use insert, since we want to overwrite existing entries
+			mNamedParams[name] = param;
+		}
+
+		if (param->mValidationFunc)
+		{
+			mValidationList.push_back(std::make_pair(param->mParamHandle, param->mValidationFunc));
+		}
+	}
+
 	BlockDescriptor::BlockDescriptor()
 	:	mMaxParamOffset(0),
 		mInitializationState(UNINITIALIZED),
@@ -150,7 +181,8 @@ namespace LLInitParam
 
 	bool BaseBlock::submitValue(Parser::name_stack_t& name_stack, Parser& p, bool silent)
 	{
-		if (!deserializeBlock(p, std::make_pair(name_stack.begin(), name_stack.end()), true))
+		Parser::name_stack_range_t range = std::make_pair(name_stack.begin(), name_stack.end());
+		if (!deserializeBlock(p, range, true))
 		{
 			if (!silent)
 			{
@@ -196,12 +228,7 @@ namespace LLInitParam
 			if (serialize_func)
 			{
 				const Param* diff_param = diff_block ? diff_block->getParamFromHandle(param_handle) : NULL;
-				// each param descriptor remembers its serial number
-				// so we can inspect the same param under different names
-				// and see that it has the same number
-				name_stack.push_back(std::make_pair("", true));
 				serialize_func(*param, parser, name_stack, diff_param);
-				name_stack.pop_back();
 			}
 		}
 
@@ -295,7 +322,7 @@ namespace LLInitParam
 		return true;
 	}
 
-	bool BaseBlock::deserializeBlock(Parser& p, Parser::name_stack_range_t name_stack_range, bool ignored)
+	bool BaseBlock::deserializeBlock(Parser& p, Parser::name_stack_range_t& name_stack_range, bool ignored)
 	{
 		BlockDescriptor& block_data = mostDerivedBlockDescriptor();
 		bool names_left = name_stack_range.first != name_stack_range.second;
@@ -308,15 +335,12 @@ namespace LLInitParam
 		{
 			const std::string& top_name = name_stack_range.first->first;
 
-			ParamDescriptor::deserialize_func_t deserialize_func = NULL;
-			Param* paramp = NULL;
-
 			BlockDescriptor::param_map_t::iterator found_it = block_data.mNamedParams.find(top_name);
 			if (found_it != block_data.mNamedParams.end())
 			{
 				// find pointer to member parameter from offset table
-				paramp = getParamFromHandle(found_it->second->mParamHandle);
-				deserialize_func = found_it->second->mDeserializeFunc;
+				Param* paramp = getParamFromHandle(found_it->second->mParamHandle);
+				ParamDescriptor::deserialize_func_t deserialize_func = found_it->second->mDeserializeFunc;
 					
 				Parser::name_stack_range_t new_name_stack(name_stack_range.first, name_stack_range.second);
 				++new_name_stack.first;
@@ -358,36 +382,6 @@ namespace LLInitParam
 		return false;
 	}
 
-	//static 
-	void BaseBlock::addParam(BlockDescriptor& block_data, const ParamDescriptorPtr in_param, const char* char_name)
-	{
-		// create a copy of the param descriptor in mAllParams
-		// so other data structures can store a pointer to it
-		block_data.mAllParams.push_back(in_param);
-		ParamDescriptorPtr param(block_data.mAllParams.back());
-
-		std::string name(char_name);
-		if ((size_t)param->mParamHandle > block_data.mMaxParamOffset)
-		{
-			llerrs << "Attempted to register param with block defined for parent class, make sure to derive from LLInitParam::Block<YOUR_CLASS, PARAM_BLOCK_BASE_CLASS>" << llendl;
-		}
-
-		if (name.empty())
-		{
-			block_data.mUnnamedParams.push_back(param);
-		}
-		else
-		{
-			// don't use insert, since we want to overwrite existing entries
-			block_data.mNamedParams[name] = param;
-		}
-
-		if (param->mValidationFunc)
-		{
-			block_data.mValidationList.push_back(std::make_pair(param->mParamHandle, param->mValidationFunc));
-		}
-	}
-
 	void BaseBlock::addSynonym(Param& param, const std::string& synonym)
 	{
 		BlockDescriptor& block_data = mostDerivedBlockDescriptor();
@@ -460,7 +454,7 @@ namespace LLInitParam
 			if (merge_func)
 			{
 				Param* paramp = getParamFromHandle((*it)->mParamHandle);
-				llassert(paramp->mEnclosingBlockOffset == (*it)->mParamHandle);
+				llassert(paramp->getEnclosingBlockOffset() == (*it)->mParamHandle);
 				some_param_changed |= merge_func(*paramp, *other_paramp, overwrite);
 			}
 		}
diff --git a/indra/llcommon/llinitparam.h b/indra/llcommon/llinitparam.h
index 0dd6030fa2..ae836645b9 100644..100755
--- a/indra/llcommon/llinitparam.h
+++ b/indra/llcommon/llinitparam.h
@@ -38,6 +38,71 @@
 #include "llerror.h"
 #include "llstl.h"
 
+namespace LLTypeTags
+{
+	template <typename INNER_TYPE, int _SORT_ORDER>
+	struct TypeTagBase
+	{
+		typedef void		is_tag_t;
+		typedef INNER_TYPE	inner_t;
+		static const int	SORT_ORDER=_SORT_ORDER;
+	};
+
+	template <int VAL1, int VAL2>
+	struct GreaterThan
+	{
+		static const bool value = VAL1 > VAL2;
+	};
+
+	template<typename ITEM, typename REST, bool NEEDS_SWAP = GreaterThan<ITEM::SORT_ORDER, REST::SORT_ORDER>::value >
+	struct Swap
+	{
+		typedef typename ITEM::template Cons<REST>::value_t value_t;
+	};
+
+	template<typename ITEM, typename REST>
+	struct Swap<ITEM, REST, true>
+	{
+		typedef typename REST::template Cons<Swap<ITEM, typename REST::inner_t>::value_t>::value_t value_t;
+	};
+
+	template<typename T, typename SORTABLE = void>
+	struct IsSortable
+	{
+		static const bool value = false;
+	};
+
+	template<typename T>
+	struct IsSortable<T, typename T::is_tag_t>
+	{
+		static const bool value = true;
+	};
+
+	template<typename ITEM, typename REST, bool IS_REST_SORTABLE = IsSortable<REST>::value>
+	struct InsertInto
+	{
+		typedef typename ITEM::template Cons<REST>::value_t value_t;
+	};
+
+	template<typename ITEM, typename REST>
+	struct InsertInto <ITEM, REST, true>
+	{
+		typedef typename Swap<ITEM, REST>::value_t value_t;
+	};
+
+	template<typename T, bool SORTABLE = IsSortable<T>::value>
+	struct Sorted
+	{
+		typedef T value_t;
+	};
+
+	template<typename T>
+	struct Sorted <T, true>
+	{
+		typedef typename InsertInto<T, typename Sorted<typename T::inner_t>::value_t>::value_t value_t;
+	};
+}
+
 namespace LLInitParam
 {
 	// used to indicate no matching value to a given name when parsing
@@ -45,6 +110,8 @@ namespace LLInitParam
 
 	template<typename T> const T& defaultValue() { static T value; return value; }
 
+	// wraps comparison operator between any 2 values of the same type
+	// specialize to handle cases where equality isn't defined well, or at all
 	template <typename T, bool IS_BOOST_FUNCTION = boost::is_convertible<T, boost::function_base>::value >
     struct ParamCompare 
 	{
@@ -79,24 +146,123 @@ namespace LLInitParam
 
 	// helper functions and classes
 	typedef ptrdiff_t param_handle_t;
+	struct IS_A_BLOCK {};
+	struct NOT_BLOCK {};
+
+	// these templates allow us to distinguish between template parameters
+	// that derive from BaseBlock and those that don't
+	template<typename T, typename BLOCK_IDENTIFIER = void>
+	struct IsBlock
+	{
+		typedef NOT_BLOCK value_t;
+	};
+
+	template<typename T>
+	struct IsBlock<T, typename T::baseblock_base_class_t>
+	{
+		typedef IS_A_BLOCK value_t;
+	};
+
+	// ParamValue class directly manages the wrapped value
+	// by holding on to a copy (scalar params)
+	// or deriving from it (blocks)
+	// has specializations for custom value behavior
+	// and "tag" values like Lazy and Atomic
+	template<typename T, typename VALUE_IS_BLOCK = typename IsBlock<T>::value_t>
+	class ParamValue
+	{
+		typedef ParamValue<T, VALUE_IS_BLOCK>	self_t;
+
+	public:
+		typedef T	default_value_t;
+		typedef T	value_t;
+
+		ParamValue(): mValue() {}
+		ParamValue(const default_value_t& other) : mValue(other) {}
+
+		void setValue(const value_t& val)
+		{
+			mValue = val;
+		}
+
+		const value_t& getValue() const
+		{
+			return mValue;
+		}
+
+		T& getValue()
+		{
+			return mValue;
+		}
+
+	protected:
+		T mValue;
+	};
+
+	template<typename T>
+	class ParamValue<T, IS_A_BLOCK> 
+	:	public T
+	{
+		typedef ParamValue<T, IS_A_BLOCK>	self_t;
+	public:
+		typedef T	default_value_t;
+		typedef T	value_t;
+
+		ParamValue() 
+		:	T(),
+			mValidated(false)
+		{}
+
+		ParamValue(const default_value_t& other)
+		:	T(other),
+			mValidated(false)
+		{}
+
+		void setValue(const value_t& val)
+		{
+			*this = val;
+		}
+
+		const value_t& getValue() const
+		{
+			return *this;
+		}
+
+		T& getValue()
+		{
+			return *this;
+		}
+
+	protected:
+		mutable bool 	mValidated; // lazy validation flag
+	};
+
 
 	// empty default implementation of key cache
 	// leverages empty base class optimization
 	template <typename T>
 	class TypeValues
+	:	public ParamValue<typename LLTypeTags::Sorted<T>::value_t>
 	{
 	private:
 		struct Inaccessable{};
 	public:
 		typedef std::map<std::string, T> value_name_map_t;
 		typedef Inaccessable name_t;
+		typedef TypeValues<T> type_value_t;
+		typedef ParamValue<typename LLTypeTags::Sorted<T>::value_t>	param_value_t;
+		typedef typename param_value_t::value_t	value_t;
+
+		TypeValues(const typename param_value_t::value_t& val)
+		:	param_value_t(val)
+		{}
 
 		void setValueName(const std::string& key) {}
 		std::string getValueName() const { return ""; }
-		std::string calcValueName(const T& value) const { return ""; }
+		std::string calcValueName(const value_t& value) const { return ""; }
 		void clearValueName() const {}
 
-		static bool getValueFromName(const std::string& name, T& value)
+		static bool getValueFromName(const std::string& name, value_t& value)
 		{
 			return false;
 		}
@@ -111,15 +277,39 @@ namespace LLInitParam
 			return NULL;
 		}
 
+		void assignNamedValue(const Inaccessable& name)
+		{}
+
+		operator const value_t&() const
+		{
+			return param_value_t::getValue();
+		}
+
+		const value_t& operator()() const
+		{
+			return param_value_t::getValue();
+		}
+
 		static value_name_map_t* getValueNames() {return NULL;}
 	};
 
-	template <typename T, typename DERIVED_TYPE = TypeValues<T> >
+	// helper class to implement name value lookups
+	// and caching of last used name
+	template <typename T, typename DERIVED_TYPE = TypeValues<T>, bool IS_SPECIALIZED = true >
 	class TypeValuesHelper
+	:	public ParamValue<typename LLTypeTags::Sorted<T>::value_t>
 	{
+		typedef TypeValuesHelper<T, DERIVED_TYPE, IS_SPECIALIZED> self_t;
 	public:
 		typedef typename std::map<std::string, T> value_name_map_t;
 		typedef std::string name_t;
+		typedef self_t type_value_t;
+		typedef ParamValue<typename LLTypeTags::Sorted<T>::value_t> param_value_t;
+		typedef typename param_value_t::value_t	value_t;
+
+		TypeValuesHelper(const typename param_value_t::value_t& val)
+		:	param_value_t(val)
+		{}
 
 		//TODO: cache key by index to save on param block size
 		void setValueName(const std::string& value_name) 
@@ -132,7 +322,7 @@ namespace LLInitParam
 			return mValueName; 
 		}
 
-		std::string calcValueName(const T& value) const
+		std::string calcValueName(const value_t& value) const
 		{
 			value_name_map_t* map = getValueNames();
 			for (typename value_name_map_t::iterator it = map->begin(), end_it = map->end();
@@ -153,7 +343,7 @@ namespace LLInitParam
 			mValueName.clear();
 		}
 
-		static bool getValueFromName(const std::string& name, T& value)
+		static bool getValueFromName(const std::string& name, value_t& value)
 		{
 			value_name_map_t* map = getValueNames();
 			typename value_name_map_t::iterator found_it = map->find(name);
@@ -195,18 +385,90 @@ namespace LLInitParam
 			return &sValues;
 		}
 
-		static void declare(const std::string& name, const T& value)
+		static void declare(const std::string& name, const value_t& value)
 		{
 			(*getValueNames())[name] = value;
 		}
 
+		void operator ()(const std::string& name)
+		{
+			*this = name;
+		}
+
+		void assignNamedValue(const std::string& name)
+		{
+			if (getValueFromName(name, param_value_t::getValue()))
+			{
+				setValueName(name);
+			}
+		}
+
+		operator const value_t&() const
+		{
+			return param_value_t::getValue();
+		}
+
+		const value_t& operator()() const
+		{
+			return param_value_t::getValue();
+		}
+
 	protected:
-		static void getName(const std::string& name, const T& value)
+		static void getName(const std::string& name, const value_t& value)
 		{}
 
 		mutable std::string	mValueName;
 	};
 
+	// string types can support custom named values, but need
+	// to disambiguate in code between a string that is a named value
+	// and a string that is a name
+	template <typename DERIVED_TYPE>
+	class TypeValuesHelper<std::string, DERIVED_TYPE, true>
+	:	public TypeValuesHelper<std::string, DERIVED_TYPE, false>
+	{
+	public:
+		typedef TypeValuesHelper<std::string, DERIVED_TYPE, true> self_t;
+		typedef TypeValuesHelper<std::string, DERIVED_TYPE, false> base_t;
+		typedef std::string value_t;
+		typedef std::string name_t;
+		typedef self_t type_value_t;
+
+		TypeValuesHelper(const std::string& val)
+		:	TypeValuesHelper(val)
+		{}
+
+		void operator ()(const std::string& name)
+	{
+			*this = name;
+		}
+
+		self_t& operator =(const std::string& name)
+		{
+			if (base_t::getValueFromName(name, ParamValue<std::string>::getValue()))
+			{
+				base_t::setValueName(name);
+			}
+			else
+			{
+				ParamValue<std::string>::setValue(name);
+			}
+			return *this;
+		}
+		
+		operator const value_t&() const
+		{
+			return ParamValue<std::string>::getValue();
+		}
+
+		const value_t& operator()() const
+		{
+			return ParamValue<std::string>::getValue();
+		}
+
+	};
+
+	// parser base class with mechanisms for registering readers/writers/inspectors of different types
 	class LL_COMMON_API Parser
 	{
 		LOG_CLASS(Parser);
@@ -223,82 +485,58 @@ namespace LLInitParam
 		typedef std::map<const std::type_info*, parser_write_func_t>	parser_write_func_map_t;
 		typedef std::map<const std::type_info*, parser_inspect_func_t>	parser_inspect_func_map_t;
 
-	private:
-		template<typename T, bool is_enum = boost::is_enum<T>::value>
-		struct ReaderWriter
-		{
-			static bool read(T& param, Parser* parser)
+	public:
+
+		Parser(parser_read_func_map_t& read_map, parser_write_func_map_t& write_map, parser_inspect_func_map_t& inspect_map)
+		:	mParseSilently(false),
+			mParserReadFuncs(&read_map),
+			mParserWriteFuncs(&write_map),
+			mParserInspectFuncs(&inspect_map)
+		{}
+
+		virtual ~Parser();
+
+		template <typename T> bool readValue(T& param, typename boost::disable_if<boost::is_enum<T> >::type* dummy = 0)
 			{
-				parser_read_func_map_t::iterator found_it = parser->mParserReadFuncs->find(&typeid(T));
-				if (found_it != parser->mParserReadFuncs->end())
+			parser_read_func_map_t::iterator found_it = mParserReadFuncs->find(&typeid(T));
+			if (found_it != mParserReadFuncs->end())
 				{
-					return found_it->second(*parser, (void*)&param);
+				return found_it->second(*this, (void*)&param);
 				}
+			
 				return false;
 			}
 			
-			static bool write(const T& param, Parser* parser, name_stack_t& name_stack)
+		template <typename T> bool readValue(T& param, typename boost::enable_if<boost::is_enum<T> >::type* dummy = 0)
 			{
-				parser_write_func_map_t::iterator found_it = parser->mParserWriteFuncs->find(&typeid(T));
-				if (found_it != parser->mParserWriteFuncs->end())
+			parser_read_func_map_t::iterator found_it = mParserReadFuncs->find(&typeid(T));
+			if (found_it != mParserReadFuncs->end())
 				{
-					return found_it->second(*parser, (const void*)&param, name_stack);
+				return found_it->second(*this, (void*)&param);
 				}
-				return false;
-			}
-		};
-
-		// read enums as ints
-		template<typename T>
-		struct ReaderWriter<T, true>
+			else
 		{
-			static bool read(T& param, Parser* parser)
-			{
-				// read all enums as ints
-				parser_read_func_map_t::iterator found_it = parser->mParserReadFuncs->find(&typeid(S32));
-				if (found_it != parser->mParserReadFuncs->end())
+				found_it = mParserReadFuncs->find(&typeid(S32));
+				if (found_it != mParserReadFuncs->end())
 				{
-					S32 value;
-					if (found_it->second(*parser, (void*)&value))
-					{
-						param = (T)value;
-						return true;
+					S32 int_value;
+					bool parsed = found_it->second(*this, (void*)&int_value);
+					param = (T)int_value;
+					return parsed;
 					}
 				}
 				return false;
 			}
 
-			static bool write(const T& param, Parser* parser, name_stack_t& name_stack)
+		template <typename T> bool writeValue(const T& param, name_stack_t& name_stack)
 			{
-				parser_write_func_map_t::iterator found_it = parser->mParserWriteFuncs->find(&typeid(S32));
-				if (found_it != parser->mParserWriteFuncs->end())
+			parser_write_func_map_t::iterator found_it = mParserWriteFuncs->find(&typeid(T));
+			if (found_it != mParserWriteFuncs->end())
 				{
-					return found_it->second(*parser, (const void*)&param, name_stack);
+				return found_it->second(*this, (const void*)&param, name_stack);
 				}
 				return false;
 			}
-		};
-
-	public:
-
-		Parser(parser_read_func_map_t& read_map, parser_write_func_map_t& write_map, parser_inspect_func_map_t& inspect_map)
-		:	mParseSilently(false),
-			mParserReadFuncs(&read_map),
-			mParserWriteFuncs(&write_map),
-			mParserInspectFuncs(&inspect_map)
-		{}
-
-		virtual ~Parser();
-
-		template <typename T> bool readValue(T& param)
-	    {
-			return ReaderWriter<T>::read(param, this);
-	    }
-
-		template <typename T> bool writeValue(const T& param, name_stack_t& name_stack)
-		{
-			return ReaderWriter<T>::write(param, this, name_stack);
-		}
 
 		// dispatch inspection to registered inspection functions, for each parameter in a param block
 		template <typename T> bool inspectValue(name_stack_t& name_stack, S32 min_count, S32 max_count, const possible_values_t* possible_values)
@@ -350,7 +588,7 @@ namespace LLInitParam
 		};
 
 		typedef bool(*merge_func_t)(Param&, const Param&, bool);
-		typedef bool(*deserialize_func_t)(Param&, Parser&, const Parser::name_stack_range_t&, bool);
+		typedef bool(*deserialize_func_t)(Param&, Parser&, Parser::name_stack_range_t&, bool);
 		typedef void(*serialize_func_t)(const Param&, Parser&, Parser::name_stack_t&, const Param* diff_param);
 		typedef void(*inspect_func_t)(const Param&, Parser&, Parser::name_stack_t&, S32 min_count, S32 max_count);
 		typedef bool(*validation_func_t)(const Param*);
@@ -395,6 +633,7 @@ namespace LLInitParam
 		} EInitializationState;
 
 		void aggregateBlockData(BlockDescriptor& src_block_data);
+		void addParam(ParamDescriptorPtr param, const char* name);
 
 		typedef boost::unordered_map<const std::string, ParamDescriptorPtr>						param_map_t; 
 		typedef std::vector<ParamDescriptorPtr>													param_list_t; 
@@ -410,48 +649,58 @@ namespace LLInitParam
 		class BaseBlock*				mCurrentBlockPtr;		// pointer to block currently being constructed
 	};
 
-	class LL_COMMON_API BaseBlock
-	{
-	public:
 		//TODO: implement in terms of owned_ptr
 		template<typename T>
-		class Lazy
+	class LazyValue
 		{
 		public:
-			Lazy()
+		LazyValue()
 				: mPtr(NULL)
 			{}
 
-			~Lazy()
+		~LazyValue()
 			{
 				delete mPtr;
 			}
 
-			Lazy(const Lazy& other)
+		LazyValue(const T& value)
 			{
-				if (other.mPtr)
+			mPtr = new T(value);
+		}
+
+		LazyValue(const LazyValue& other)
+		:	mPtr(NULL)
 				{
-					mPtr = new T(*other.mPtr);
+			*this = other;
 				}
-				else
+
+		LazyValue& operator = (const LazyValue& other)
 				{
+			if (!other.mPtr)
+			{
+				delete mPtr;
 					mPtr = NULL;
 				}
-			}
-
-			Lazy<T>& operator = (const Lazy<T>& other)
+			else
 			{
-				if (other.mPtr)
+				if (!mPtr)
 				{
 					mPtr = new T(*other.mPtr);
 				}
 				else
 				{
-					mPtr = NULL;
+					*mPtr = *(other.mPtr);
+				}
 				}
 				return *this;
 			}
 
+		bool operator==(const LazyValue& other) const
+		{
+			if (empty() || other.empty()) return false;
+			return *mPtr == *other.mPtr;
+		}
+
 			bool empty() const
 			{
 				return mPtr == NULL;
@@ -459,18 +708,29 @@ namespace LLInitParam
 
 			void set(const T& other)
 			{
-				delete mPtr;
+			if (!mPtr)
+			{
 				mPtr = new T(other);
 			}
+			else
+			{
+				*mPtr = other;
+			}
+		}
 
 			const T& get() const
 			{
-				return ensureInstance();
+			return *ensureInstance();
 			}
 
 			T& get()
 			{
-				return ensureInstance();
+			return *ensureInstance();
+		}
+
+		operator const T&() const
+		{ 
+			return get(); 
 			}
 
 		private:
@@ -485,13 +745,50 @@ namespace LLInitParam
 			}
 
 		private:
-			// if you get a compilation error with this, that means you are using a forward declared struct for T
-			// unfortunately, the type traits we rely on don't work with forward declared typed
-			//static const int dummy = sizeof(T);
 
 			mutable T* mPtr;
 		};
 
+	// root class of all parameter blocks
+
+	class LL_COMMON_API BaseBlock
+	{
+	public:
+		// lift block tags into baseblock namespace so derived classes do not need to qualify them
+		typedef LLInitParam::IS_A_BLOCK IS_A_BLOCK;
+		typedef LLInitParam::NOT_BLOCK NOT_A_BLOCK;
+
+		template<typename T>
+		struct Sequential : public LLTypeTags::TypeTagBase<T, 2>
+		{
+			template <typename S> struct Cons { typedef Sequential<ParamValue<S> > value_t; };
+			template <typename S> struct Cons<Sequential<S> > { typedef Sequential<S> value_t; };
+		};
+
+		template<typename T>
+		struct Atomic : public LLTypeTags::TypeTagBase<T, 1>
+		{
+			template <typename S> struct Cons { typedef Atomic<ParamValue<S> > value_t; };
+			template <typename S> struct Cons<Atomic<S> > { typedef Atomic<S> value_t; };
+		};
+
+		template<typename T, typename BLOCK_T = typename IsBlock<T>::value_t >
+		struct Lazy : public LLTypeTags::TypeTagBase<T, 0>
+		{
+			template <typename S> struct Cons
+			{
+				typedef Lazy<ParamValue<S, BLOCK_T>, BLOCK_T> value_t;
+			};
+			template <typename S> struct Cons<Lazy<S, IS_A_BLOCK> >
+			{
+				typedef Lazy<S, IS_A_BLOCK> value_t;
+			};
+			template <typename S> struct Cons<Lazy<S, NOT_A_BLOCK> >
+			{
+				typedef Lazy<S, BLOCK_T> value_t;
+			};
+		};
+
 		// "Multiple" constraint types, put here in root class to avoid ambiguity during use
 		struct AnyAmount
 		{
@@ -557,12 +854,12 @@ namespace LLInitParam
 		// Blocks can override this to do custom tracking of changes
 		virtual void paramChanged(const Param& changed_param, bool user_provided) {}
 
-		bool deserializeBlock(Parser& p, Parser::name_stack_range_t name_stack_range, bool new_name);
+		bool deserializeBlock(Parser& p, Parser::name_stack_range_t& name_stack_range, bool new_name);
 		void serializeBlock(Parser& p, Parser::name_stack_t& name_stack, const BaseBlock* diff_block = NULL) const;
 		bool inspectBlock(Parser& p, Parser::name_stack_t name_stack = Parser::name_stack_t(), S32 min_count = 0, S32 max_count = S32_MAX) const;
 
-		virtual const BlockDescriptor& mostDerivedBlockDescriptor() const { return selfBlockDescriptor(); }
-		virtual BlockDescriptor& mostDerivedBlockDescriptor() { return selfBlockDescriptor(); }
+		virtual const BlockDescriptor& mostDerivedBlockDescriptor() const { return getBlockDescriptor(); }
+		virtual BlockDescriptor& mostDerivedBlockDescriptor() { return getBlockDescriptor(); }
 
 		// take all provided params from other and apply to self
 		bool overwriteFrom(const BaseBlock& other)
@@ -576,10 +873,17 @@ namespace LLInitParam
 			return false;
 		}
 
-		static void addParam(BlockDescriptor& block_data, ParamDescriptorPtr param, const char* name);
-
 		ParamDescriptorPtr findParamDescriptor(const Param& param);
 
+		// take all provided params from other and apply to self
+		bool mergeBlock(BlockDescriptor& block_data, const BaseBlock& other, bool overwrite);
+
+		static BlockDescriptor& getBlockDescriptor()
+		{
+			static BlockDescriptor sBlockDescriptor;
+			return sBlockDescriptor;
+		}
+
 	protected:
 		void init(BlockDescriptor& descriptor, BlockDescriptor& base_descriptor, size_t block_size);
 
@@ -588,25 +892,11 @@ namespace LLInitParam
 		{
 			return mergeBlock(block_data, source, overwrite);
 		}
-		// take all provided params from other and apply to self
-		bool mergeBlock(BlockDescriptor& block_data, const BaseBlock& other, bool overwrite);
-
-		static BlockDescriptor& selfBlockDescriptor()
-		{
-			static BlockDescriptor sBlockDescriptor;
-			return sBlockDescriptor;
-		}
 
 	private:
 		const std::string& getParamName(const BlockDescriptor& block_data, const Param* paramp) const;
 	};
 
-	template<typename T>
-	struct ParamCompare<BaseBlock::Lazy<T>, false >
-	{
-		static bool equals(const BaseBlock::Lazy<T>& a, const BaseBlock::Lazy<T>& b) { return !a.empty() || !b.empty(); }
-	};
-
 	class LL_COMMON_API Param
 	{
 	public:
@@ -635,256 +925,68 @@ namespace LLInitParam
 			// get address of enclosing BLOCK class using stored offset to enclosing BaseBlock class
 			return *const_cast<BaseBlock*>
 				(reinterpret_cast<const BaseBlock*>
-					(my_addr - (ptrdiff_t)(S32)mEnclosingBlockOffset));
-		}
-
-	private:
-		friend class BaseBlock;
-
-		U32		mEnclosingBlockOffset:31;
-		U32		mIsProvided:1;
-
-	};
-
-	// these templates allow us to distinguish between template parameters
-	// that derive from BaseBlock and those that don't
-	template<typename T, typename Void = void>
-	struct IsBlock
-	{
-		static const bool value = false;
-		struct EmptyBase {};
-		typedef EmptyBase base_class_t;
-	};
-
-	template<typename T>
-	struct IsBlock<T, typename T::baseblock_base_class_t>
-	{
-		static const bool value = true;
-		typedef BaseBlock base_class_t;
-	};
-
-	template<typename T>
-	struct IsBlock<BaseBlock::Lazy<T>, typename T::baseblock_base_class_t >
-	{
-		static const bool value = true;
-		typedef BaseBlock base_class_t;
-	};
-
-	template<typename T, typename NAME_VALUE_LOOKUP, bool VALUE_IS_BLOCK = IsBlock<T>::value>
-	class ParamValue : public NAME_VALUE_LOOKUP
-	{
-	public:
-		typedef const T&							value_assignment_t;
-		typedef T									value_t;
-		typedef ParamValue<T, NAME_VALUE_LOOKUP, VALUE_IS_BLOCK>	self_t;
-
-		ParamValue(): mValue() {}
-		ParamValue(value_assignment_t other) : mValue(other) {}
-
-		void setValue(value_assignment_t val)
-		{
-			mValue = val;
-		}
-
-		value_assignment_t getValue() const
-		{
-			return mValue;
-		}
-
-		T& getValue()
-		{
-			return mValue;
-		}
-
-		operator value_assignment_t() const
-		{
-			return mValue;
-		}
-
-		value_assignment_t operator()() const
-		{
-			return mValue;
-		}
-
-		void operator ()(const typename NAME_VALUE_LOOKUP::name_t& name)
-		{
-			*this = name;
-		}
-
-		self_t& operator =(const typename NAME_VALUE_LOOKUP::name_t& name)
-		{
-			if (NAME_VALUE_LOOKUP::getValueFromName(name, mValue))
-			{
-				setValueName(name);
-			}
-
-			return *this;
-		}
-
-	protected:
-		T mValue;
-	};
-
-	template<typename T, typename NAME_VALUE_LOOKUP>
-	class ParamValue<T, NAME_VALUE_LOOKUP, true> 
-	:	public T,
-		public NAME_VALUE_LOOKUP
-	{
-	public:
-		typedef const T&							value_assignment_t;
-		typedef T									value_t;
-		typedef ParamValue<T, NAME_VALUE_LOOKUP, true>	self_t;
-
-		ParamValue() 
-		:	T(),
-			mValidated(false)
-		{}
-
-		ParamValue(value_assignment_t other)
-		:	T(other),
-			mValidated(false)
-		{}
-
-		void setValue(value_assignment_t val)
-		{
-			*this = val;
-		}
-
-		value_assignment_t getValue() const
-		{
-			return *this;
-		}
-
-		T& getValue()
-		{
-			return *this;
-		}
-
-		operator value_assignment_t() const
-		{
-			return *this;
-		}
-		
-		value_assignment_t operator()() const
-		{
-			return *this;
-		}
-
-		void operator ()(const typename NAME_VALUE_LOOKUP::name_t& name)
-		{
-			*this = name;
-		}
-
-		self_t& operator =(const typename NAME_VALUE_LOOKUP::name_t& name)
-		{
-			if (NAME_VALUE_LOOKUP::getValueFromName(name, *this))
-			{
-				setValueName(name);
-			}
-
-			return *this;
+					(my_addr - (ptrdiff_t)getEnclosingBlockOffset()));
 		}
 
-	protected:
-		mutable bool 	mValidated; // lazy validation flag
-	};
-
-	template<typename NAME_VALUE_LOOKUP>
-	class ParamValue<std::string, NAME_VALUE_LOOKUP, false>
-	: public NAME_VALUE_LOOKUP
+		U32 getEnclosingBlockOffset() const
 	{
-	public:
-		typedef const std::string&	value_assignment_t;
-		typedef std::string			value_t;
-		typedef ParamValue<std::string, NAME_VALUE_LOOKUP, false>	self_t;
-
-		ParamValue(): mValue() {}
-		ParamValue(value_assignment_t other) : mValue(other) {}
-
-		void setValue(value_assignment_t val)
-		{
-			if (NAME_VALUE_LOOKUP::getValueFromName(val, mValue))
-			{
-				NAME_VALUE_LOOKUP::setValueName(val);
-			}
-			else
-			{
-				mValue = val;
-			}
-		}
-
-		value_assignment_t getValue() const
-		{
-			return mValue;
-		}
-
-		std::string& getValue()
-		{
-			return mValue;
+			return ((U32)mEnclosingBlockOffsetHigh << 16) | (U32)mEnclosingBlockOffsetLow;
 		}
 
-		operator value_assignment_t() const
-		{
-			return mValue;
-		}
+	private:
+		friend class BaseBlock;
 
-		value_assignment_t operator()() const
-		{
-			return mValue;
-		}
+		//24 bits for member offset field and 1 bit for provided flag
+		U16		mEnclosingBlockOffsetLow;
+		U8		mEnclosingBlockOffsetHigh:7;
+		U8		mIsProvided:1;
 
-	protected:
-		std::string mValue;
 	};
 
-
 	template<typename T, typename NAME_VALUE_LOOKUP = TypeValues<T> >
 	struct ParamIterator
 	{
-		typedef typename std::vector<ParamValue<T, NAME_VALUE_LOOKUP> >::const_iterator		const_iterator;
-		typedef typename std::vector<ParamValue<T, NAME_VALUE_LOOKUP> >::iterator			iterator;
+		typedef typename std::vector<typename NAME_VALUE_LOOKUP::type_value_t >::const_iterator	const_iterator;
+		typedef typename std::vector<typename NAME_VALUE_LOOKUP::type_value_t >::iterator			iterator;
 	};
 
-	// specialize for custom parsing/decomposition of specific classes
-	// e.g. TypedParam<LLRect> has left, top, right, bottom, etc...
+	// wrapper for parameter with a known type
+	// specialized to handle 4 cases:
+	// simple "scalar" value
+	// parameter that is itself a block
+	// multiple scalar values, stored in a vector
+	// multiple blocks, stored in a vector
 	template<typename	T,
 			typename	NAME_VALUE_LOOKUP = TypeValues<T>,
 			bool		HAS_MULTIPLE_VALUES = false,
-			bool		VALUE_IS_BLOCK = IsBlock<ParamValue<T, NAME_VALUE_LOOKUP> >::value>
+			typename	VALUE_IS_BLOCK = typename IsBlock<ParamValue<typename LLTypeTags::Sorted<T>::value_t> >::value_t>
 	class TypedParam 
 	:	public Param, 
-		public ParamValue<T, NAME_VALUE_LOOKUP>
+		public NAME_VALUE_LOOKUP::type_value_t
 	{
+	protected:
+		typedef	TypedParam<T, NAME_VALUE_LOOKUP, HAS_MULTIPLE_VALUES, VALUE_IS_BLOCK>	self_t;
+		typedef ParamValue<typename LLTypeTags::Sorted<T>::value_t>						param_value_t;
+		typedef typename param_value_t::default_value_t									default_value_t;
+		typedef typename NAME_VALUE_LOOKUP::type_value_t								named_value_t;
 	public:
-		typedef	TypedParam<T, NAME_VALUE_LOOKUP, HAS_MULTIPLE_VALUES, VALUE_IS_BLOCK>		self_t;
-		typedef ParamValue<T, NAME_VALUE_LOOKUP>											param_value_t;
-		typedef typename param_value_t::value_assignment_t				value_assignment_t;
-		typedef NAME_VALUE_LOOKUP															name_value_lookup_t;
+		typedef typename param_value_t::value_t											value_t;
 
-		using param_value_t::operator();
+		using named_value_t::operator();
 
-		TypedParam(BlockDescriptor& block_descriptor, const char* name, value_assignment_t value, ParamDescriptor::validation_func_t validate_func, S32 min_count, S32 max_count) 
-		:	Param(block_descriptor.mCurrentBlockPtr)
+		TypedParam(BlockDescriptor& block_descriptor, const char* name, const default_value_t& value, ParamDescriptor::validation_func_t validate_func, S32 min_count, S32 max_count)
+		:	Param(block_descriptor.mCurrentBlockPtr),
+			named_value_t(value)
 		{
 			if (LL_UNLIKELY(block_descriptor.mInitializationState == BlockDescriptor::INITIALIZING))
 			{
- 				ParamDescriptorPtr param_descriptor = ParamDescriptorPtr(new ParamDescriptor(
-												block_descriptor.mCurrentBlockPtr->getHandleFromParam(this),
-												&mergeWith,
-												&deserializeParam,
-												&serializeParam,
-												validate_func,
-												&inspectParam,
-												min_count, max_count));
-				BaseBlock::addParam(block_descriptor, param_descriptor, name);
+				init(block_descriptor, validate_func, min_count, max_count, name);
 			}
-
-			setValue(value);
 		} 
 
 		bool isProvided() const { return Param::anyProvided(); }
 
-		static bool deserializeParam(Param& param, Parser& parser, const Parser::name_stack_range_t& name_stack_range, bool new_name)
+		static bool deserializeParam(Param& param, Parser& parser, Parser::name_stack_range_t& name_stack_range, bool new_name)
 		{ 
 			self_t& typed_param = static_cast<self_t&>(param);
 			// no further names in stack, attempt to parse value now
@@ -893,9 +995,9 @@ namespace LLInitParam
 				std::string name;
 
 				// try to parse a known named value
-				if(name_value_lookup_t::valueNamesExist()
+				if(named_value_t::valueNamesExist()
 					&& parser.readValue(name)
-					&& name_value_lookup_t::getValueFromName(name, typed_param.getValue()))
+					&& named_value_t::getValueFromName(name, typed_param.getValue()))
 				{
 					typed_param.setValueName(name);
 					typed_param.setProvided();
@@ -939,7 +1041,9 @@ namespace LLInitParam
 				if (!parser.writeValue(typed_param.getValue(), name_stack)) 
 				{
 					std::string calculated_key = typed_param.calcValueName(typed_param.getValue());
-					if (!diff_param || !ParamCompare<std::string>::equals(static_cast<const self_t*>(diff_param)->getValueName(), calculated_key))
+					if (calculated_key.size() 
+						&& (!diff_param 
+							|| !ParamCompare<std::string>::equals(static_cast<const self_t*>(diff_param)->getValueName(), calculated_key)))
 					{
 						parser.writeValue(calculated_key, name_stack);
 					}
@@ -952,22 +1056,23 @@ namespace LLInitParam
 			// tell parser about our actual type
 			parser.inspectValue<T>(name_stack, min_count, max_count, NULL);
 			// then tell it about string-based alternatives ("red", "blue", etc. for LLColor4)
-			if (name_value_lookup_t::getPossibleValues())
+			if (named_value_t::getPossibleValues())
 			{
-				parser.inspectValue<std::string>(name_stack, min_count, max_count, name_value_lookup_t::getPossibleValues());
+				parser.inspectValue<std::string>(name_stack, min_count, max_count, named_value_t::getPossibleValues());
 			}
 		}
 
-		void set(value_assignment_t val, bool flag_as_provided = true)
+		void set(const value_t& val, bool flag_as_provided = true)
 		{
-			param_value_t::clearValueName();
+			named_value_t::clearValueName();
 			setValue(val);
 			setProvided(flag_as_provided);
 		}
 
-		self_t& operator =(const typename NAME_VALUE_LOOKUP::name_t& name)
+		self_t& operator =(const typename named_value_t::name_t& name)
 		{
-			return static_cast<self_t&>(param_value_t::operator =(name));
+			named_value_t::assignNamedValue(name);
+			return *this;
 		}
 
 	protected:
@@ -992,41 +1097,47 @@ namespace LLInitParam
 			}
 			return false;
 		}
+	private:
+		void init( BlockDescriptor &block_descriptor, ParamDescriptor::validation_func_t validate_func, S32 min_count, S32 max_count, const char* name ) 
+		{
+			ParamDescriptorPtr param_descriptor = ParamDescriptorPtr(new ParamDescriptor(
+				block_descriptor.mCurrentBlockPtr->getHandleFromParam(this),
+				&mergeWith,
+				&deserializeParam,
+				&serializeParam,
+				validate_func,
+				&inspectParam,
+				min_count, max_count));
+			block_descriptor.addParam(param_descriptor, name);
+		}
 	};
 
 	// parameter that is a block
 	template <typename T, typename NAME_VALUE_LOOKUP>
-	class TypedParam<T, NAME_VALUE_LOOKUP, false, true> 
+	class TypedParam<T, NAME_VALUE_LOOKUP, false, IS_A_BLOCK> 
 	:	public Param,
-		public ParamValue<T, NAME_VALUE_LOOKUP>
+		public NAME_VALUE_LOOKUP::type_value_t
 	{
+	protected:
+		typedef ParamValue<typename LLTypeTags::Sorted<T>::value_t>	param_value_t;
+		typedef typename param_value_t::default_value_t				default_value_t;
+		typedef TypedParam<T, NAME_VALUE_LOOKUP, false, IS_A_BLOCK>	self_t;
+		typedef typename NAME_VALUE_LOOKUP::type_value_t			named_value_t;
 	public:
-		typedef ParamValue<T, NAME_VALUE_LOOKUP>				param_value_t;
-		typedef typename param_value_t::value_assignment_t		value_assignment_t;
-		typedef TypedParam<T, NAME_VALUE_LOOKUP, false, true>	self_t;
-		typedef NAME_VALUE_LOOKUP								name_value_lookup_t;
-
-		using param_value_t::operator();
+		using named_value_t::operator();
+		typedef typename param_value_t::value_t						value_t;
 
-		TypedParam(BlockDescriptor& block_descriptor, const char* name, value_assignment_t value, ParamDescriptor::validation_func_t validate_func, S32 min_count, S32 max_count)
+		TypedParam(BlockDescriptor& block_descriptor, const char* name, const default_value_t& value, ParamDescriptor::validation_func_t validate_func, S32 min_count, S32 max_count)
 		:	Param(block_descriptor.mCurrentBlockPtr),
-			param_value_t(value)
+			named_value_t(value)
 		{
 			if (LL_UNLIKELY(block_descriptor.mInitializationState == BlockDescriptor::INITIALIZING))
 			{
-				ParamDescriptorPtr param_descriptor = ParamDescriptorPtr(new ParamDescriptor(
-												block_descriptor.mCurrentBlockPtr->getHandleFromParam(this),
-												&mergeWith,
-												&deserializeParam,
-												&serializeParam,
-												validate_func, 
-												&inspectParam,
-												min_count, max_count));
-				BaseBlock::addParam(block_descriptor, param_descriptor, name);
+				init(block_descriptor, validate_func, min_count, max_count, name);
 			}
 		}
 
-		static bool deserializeParam(Param& param, Parser& parser, const Parser::name_stack_range_t& name_stack_range, bool new_name)
+		static bool deserializeParam(Param& param, Parser& parser, Parser::name_stack_range_t& name_stack_range, bool new_name)
 		{ 
 			self_t& typed_param = static_cast<self_t&>(param);
 
@@ -1034,9 +1145,9 @@ namespace LLInitParam
 			{	// try to parse a known named value
 				std::string name;
 
-				if(name_value_lookup_t::valueNamesExist()
+				if(named_value_t::valueNamesExist()
 					&& parser.readValue(name)				
-					&& name_value_lookup_t::getValueFromName(name, typed_param.getValue()))
+					&& named_value_t::getValueFromName(name, typed_param.getValue()))
 				{
 					typed_param.setValueName(name);
 					typed_param.setProvided();
@@ -1068,9 +1179,9 @@ namespace LLInitParam
 			std::string key = typed_param.getValueName();
 			if (!key.empty())
 			{
-				if (!parser.writeValue(key, name_stack))
+				if (!diff_param || !ParamCompare<std::string>::equals(static_cast<const self_t*>(diff_param)->getValueName(), key))
 				{
-					return;
+					parser.writeValue(key, name_stack);
 				}
 			}
 			else
@@ -1081,8 +1192,16 @@ namespace LLInitParam
 
 		static void inspectParam(const Param& param, Parser& parser, Parser::name_stack_t& name_stack, S32 min_count, S32 max_count)
 		{
-			// I am a param that is also a block, so just recurse into my contents
 			const self_t& typed_param = static_cast<const self_t&>(param);
+
+			// tell parser about our actual type
+			parser.inspectValue<value_t>(name_stack, min_count, max_count, NULL);
+			// then tell it about string-based alternatives ("red", "blue", etc. for LLColor4)
+			if (named_value_t::getPossibleValues())
+			{
+				parser.inspectValue<std::string>(name_stack, min_count, max_count, named_value_t::getPossibleValues());
+			}
+
 			typed_param.inspectBlock(parser, name_stack, min_count, max_count);
 		}
 
@@ -1100,32 +1219,34 @@ namespace LLInitParam
 		}
 
 		// assign block contents to this param-that-is-a-block
-		void set(value_assignment_t val, bool flag_as_provided = true)
+		void set(const value_t& val, bool flag_as_provided = true)
 		{
 			setValue(val);
-			param_value_t::clearValueName();
+			named_value_t::clearValueName();
 			// force revalidation of block
 			// next call to isProvided() will update provision status based on validity
 			param_value_t::mValidated = false;
 			setProvided(flag_as_provided);
 		}
 
-		self_t& operator =(const typename NAME_VALUE_LOOKUP::name_t& name)
+		self_t& operator =(const typename named_value_t::name_t& name)
 		{
-			return static_cast<self_t&>(param_value_t::operator =(name));
+			named_value_t::assignNamedValue(name);
+			return *this;
 		}
 
 		// propagate changed status up to enclosing block
 		/*virtual*/ void paramChanged(const Param& changed_param, bool user_provided)
 		{ 
 			param_value_t::paramChanged(changed_param, user_provided);
+
 			if (user_provided)
 			{
 				// a child param has been explicitly changed
 				// so *some* aspect of this block is now provided
 				param_value_t::mValidated = false;
 				setProvided();
-				param_value_t::clearValueName();
+				named_value_t::clearValueName();
 			}
 			else
 			{
@@ -1149,7 +1270,7 @@ namespace LLInitParam
 
 			if (src_typed_param.anyProvided())
 			{
-				if (dst_typed_param.mergeBlockParam(src_typed_param.isProvided(), dst_typed_param.isProvided(), param_value_t::selfBlockDescriptor(), src_typed_param, overwrite))
+				if (dst_typed_param.mergeBlockParam(src_typed_param.isProvided(), dst_typed_param.isProvided(), param_value_t::getBlockDescriptor(), src_typed_param, overwrite))
 				{
 					dst_typed_param.clearValueName();
 					dst_typed_param.setProvided(true);
@@ -1158,56 +1279,72 @@ namespace LLInitParam
 			}
 			return false;
 		}
+
+	private:
+		void init( BlockDescriptor &block_descriptor, ParamDescriptor::validation_func_t validate_func, S32 min_count, S32 max_count, const char* name ) 
+		{
+			ParamDescriptorPtr param_descriptor = ParamDescriptorPtr(new ParamDescriptor(
+				block_descriptor.mCurrentBlockPtr->getHandleFromParam(this),
+				&mergeWith,
+				&deserializeParam,
+				&serializeParam,
+				validate_func, 
+				&inspectParam,
+				min_count, max_count));
+			block_descriptor.addParam(param_descriptor, name);
+		}
 	};
 
-	// container of non-block parameters
+	// list of non-block parameters
 	template <typename VALUE_TYPE, typename NAME_VALUE_LOOKUP>
-	class TypedParam<VALUE_TYPE, NAME_VALUE_LOOKUP, true, false> 
+	class TypedParam<VALUE_TYPE, NAME_VALUE_LOOKUP, true, NOT_BLOCK> 
 	:	public Param
 	{
+	protected:
+		typedef TypedParam<VALUE_TYPE, NAME_VALUE_LOOKUP, true, NOT_BLOCK>		self_t;
+		typedef ParamValue<typename LLTypeTags::Sorted<VALUE_TYPE>::value_t>	param_value_t;
+		typedef typename std::vector<typename NAME_VALUE_LOOKUP::type_value_t>	container_t;
+		typedef container_t														default_value_t;
+		typedef typename NAME_VALUE_LOOKUP::type_value_t						named_value_t;
+		
 	public:
-		typedef TypedParam<VALUE_TYPE, NAME_VALUE_LOOKUP, true, false>		self_t;
-		typedef ParamValue<VALUE_TYPE, NAME_VALUE_LOOKUP>					param_value_t;
-		typedef typename std::vector<param_value_t>							container_t;
-		typedef const container_t&											value_assignment_t;
-
 		typedef typename param_value_t::value_t								value_t;
-		typedef NAME_VALUE_LOOKUP											name_value_lookup_t;
 		
-		TypedParam(BlockDescriptor& block_descriptor, const char* name, value_assignment_t value, ParamDescriptor::validation_func_t validate_func, S32 min_count, S32 max_count) 
+		TypedParam(BlockDescriptor& block_descriptor, const char* name, const default_value_t& value, ParamDescriptor::validation_func_t validate_func, S32 min_count, S32 max_count)
 		:	Param(block_descriptor.mCurrentBlockPtr)
 		{
 			std::copy(value.begin(), value.end(), std::back_inserter(mValues));
 
 			if (LL_UNLIKELY(block_descriptor.mInitializationState == BlockDescriptor::INITIALIZING))
 			{
-				ParamDescriptorPtr param_descriptor = ParamDescriptorPtr(new ParamDescriptor(
-												block_descriptor.mCurrentBlockPtr->getHandleFromParam(this),
-												&mergeWith,
-												&deserializeParam,
-												&serializeParam,
-												validate_func,
-												&inspectParam,
-												min_count, max_count));
-				BaseBlock::addParam(block_descriptor, param_descriptor, name);
+				init(block_descriptor, validate_func, min_count, max_count, name);
+
 			}
 		} 
 
 		bool isProvided() const { return Param::anyProvided(); }
 
-		static bool deserializeParam(Param& param, Parser& parser, const Parser::name_stack_range_t& name_stack_range, bool new_name)
+		static bool deserializeParam(Param& param, Parser& parser, Parser::name_stack_range_t& name_stack_range, bool new_name)
 		{ 
+			Parser::name_stack_range_t new_name_stack_range(name_stack_range);
 			self_t& typed_param = static_cast<self_t&>(param);
 			value_t value;
+
+			// pop first element if empty string
+			if (new_name_stack_range.first != new_name_stack_range.second && new_name_stack_range.first->first.empty())
+			{
+				++new_name_stack_range.first;
+			}
+
 			// no further names in stack, attempt to parse value now
 			if (name_stack_range.first == name_stack_range.second)
 			{	
 				std::string name;
 				
 				// try to parse a known named value
-				if(name_value_lookup_t::valueNamesExist()
+				if(named_value_t::valueNamesExist()
 					&& parser.readValue(name)
-					&& name_value_lookup_t::getValueFromName(name, value))
+					&& named_value_t::getValueFromName(name, value))
 				{
 					typed_param.add(value);
 					typed_param.mValues.back().setValueName(name);
@@ -1225,14 +1362,14 @@ namespace LLInitParam
 		static void serializeParam(const Param& param, Parser& parser, Parser::name_stack_t& name_stack, const Param* diff_param)
 		{
 			const self_t& typed_param = static_cast<const self_t&>(param);
-			if (!typed_param.isProvided() || name_stack.empty()) return;
+			if (!typed_param.isProvided()) return;
 
 			for (const_iterator it = typed_param.mValues.begin(), end_it = typed_param.mValues.end();
 				it != end_it;
 				++it)
 			{
 				std::string key = it->getValueName();
-				name_stack.back().second = true;
+				name_stack.push_back(std::make_pair(std::string(), true));
 
 				if(key.empty())
 				// not parsed via name values, write out value directly
@@ -1254,19 +1391,21 @@ namespace LLInitParam
 						break;
 					}
 				}
+
+				name_stack.pop_back();
 			}
 		}
 
 		static void inspectParam(const Param& param, Parser& parser, Parser::name_stack_t& name_stack, S32 min_count, S32 max_count)
 		{
 			parser.inspectValue<VALUE_TYPE>(name_stack, min_count, max_count, NULL);
-			if (name_value_lookup_t::getPossibleValues())
+			if (named_value_t::getPossibleValues())
 			{
-				parser.inspectValue<std::string>(name_stack, min_count, max_count, name_value_lookup_t::getPossibleValues());
+				parser.inspectValue<std::string>(name_stack, min_count, max_count, named_value_t::getPossibleValues());
 			}
 		}
 
-		void set(value_assignment_t val, bool flag_as_provided = true)
+		void set(const container_t& val, bool flag_as_provided = true)
 		{
 			mValues = val;
 			setProvided(flag_as_provided);
@@ -1274,26 +1413,24 @@ namespace LLInitParam
 
 		param_value_t& add()
 		{
-			mValues.push_back(param_value_t(value_t()));
+			mValues.push_back(value_t());
 			Param::setProvided();
 			return mValues.back();
 		}
 
 		self_t& add(const value_t& item)
 		{
-			param_value_t param_value;
-			param_value.setValue(item);
-			mValues.push_back(param_value);
+			mValues.push_back(item);
 			setProvided();
 			return *this;
 		}
 
-		self_t& add(const typename name_value_lookup_t::name_t& name)
+		self_t& add(const typename named_value_t::name_t& name)
 		{
 			value_t value;
 
 			// try to parse a per type named value
-			if (name_value_lookup_t::getValueFromName(name, value))
+			if (named_value_t::getValueFromName(name, value))
 			{
 				add(value);
 				mValues.back().setValueName(name);
@@ -1303,9 +1440,9 @@ namespace LLInitParam
 		}
 
 		// implicit conversion
-		operator value_assignment_t() const { return mValues; } 
+		operator const container_t&() const { return mValues; } 
 		// explicit conversion		
-		value_assignment_t operator()() const { return mValues; }
+		const container_t& operator()() const { return mValues; }
 
 		typedef typename container_t::iterator iterator;
 		typedef typename container_t::const_iterator const_iterator;
@@ -1346,62 +1483,79 @@ namespace LLInitParam
 		}
 
 		container_t		mValues;
+
+	private:
+		void init( BlockDescriptor &block_descriptor, ParamDescriptor::validation_func_t validate_func, S32 min_count, S32 max_count, const char* name ) 
+		{
+			ParamDescriptorPtr param_descriptor = ParamDescriptorPtr(new ParamDescriptor(
+				block_descriptor.mCurrentBlockPtr->getHandleFromParam(this),
+				&mergeWith,
+				&deserializeParam,
+				&serializeParam,
+				validate_func,
+				&inspectParam,
+				min_count, max_count));
+			block_descriptor.addParam(param_descriptor, name);
+		}
 	};
 
-	// container of block parameters
+	// list of block parameters
 	template <typename VALUE_TYPE, typename NAME_VALUE_LOOKUP>
-	class TypedParam<VALUE_TYPE, NAME_VALUE_LOOKUP, true, true> 
+	class TypedParam<VALUE_TYPE, NAME_VALUE_LOOKUP, true, IS_A_BLOCK> 
 	:	public Param
 	{
+	protected:
+		typedef TypedParam<VALUE_TYPE, NAME_VALUE_LOOKUP, true, IS_A_BLOCK>		self_t;
+		typedef ParamValue<typename LLTypeTags::Sorted<VALUE_TYPE>::value_t>	param_value_t;
+		typedef typename std::vector<typename NAME_VALUE_LOOKUP::type_value_t>	container_t;
+		typedef typename NAME_VALUE_LOOKUP::type_value_t						named_value_t;
+		typedef container_t														default_value_t;
+		typedef typename container_t::iterator									iterator;
+		typedef typename container_t::const_iterator							const_iterator;
 	public:
-		typedef TypedParam<VALUE_TYPE, NAME_VALUE_LOOKUP, true, true>	self_t;
-		typedef ParamValue<VALUE_TYPE, NAME_VALUE_LOOKUP>				param_value_t;
-		typedef typename std::vector<param_value_t>						container_t;
-		typedef const container_t&										value_assignment_t;
 		typedef typename param_value_t::value_t							value_t;
-		typedef NAME_VALUE_LOOKUP										name_value_lookup_t;
 
-		TypedParam(BlockDescriptor& block_descriptor, const char* name, value_assignment_t value, ParamDescriptor::validation_func_t validate_func, S32 min_count, S32 max_count) 
+		TypedParam(BlockDescriptor& block_descriptor, const char* name, const default_value_t& value, ParamDescriptor::validation_func_t validate_func, S32 min_count, S32 max_count)
 		:	Param(block_descriptor.mCurrentBlockPtr)
 		{
 			std::copy(value.begin(), value.end(), back_inserter(mValues));
 
 			if (LL_UNLIKELY(block_descriptor.mInitializationState == BlockDescriptor::INITIALIZING))
 			{
-				ParamDescriptorPtr param_descriptor = ParamDescriptorPtr(new ParamDescriptor(
-												block_descriptor.mCurrentBlockPtr->getHandleFromParam(this),
-												&mergeWith,
-												&deserializeParam,
-												&serializeParam,
-												validate_func,
-												&inspectParam,
-												min_count, max_count));
-				BaseBlock::addParam(block_descriptor, param_descriptor, name);
+				init(block_descriptor, validate_func, min_count, max_count, name);
 			}
 		} 
 
 		bool isProvided() const { return Param::anyProvided(); }
 
-		static bool deserializeParam(Param& param, Parser& parser, const Parser::name_stack_range_t& name_stack_range, bool new_name) 
+		static bool deserializeParam(Param& param, Parser& parser, Parser::name_stack_range_t& name_stack_range, bool new_name) 
 		{ 
+			Parser::name_stack_range_t new_name_stack_range(name_stack_range);
 			self_t& typed_param = static_cast<self_t&>(param);
 			bool new_value = false;
+			bool new_array_value = false;
 
-			if (new_name || typed_param.mValues.empty())
+			// pop first element if empty string
+			if (new_name_stack_range.first != new_name_stack_range.second && new_name_stack_range.first->first.empty())
+			{
+				new_array_value = new_name_stack_range.first->second;
+				++new_name_stack_range.first;
+			}
+
+			if (new_name || new_array_value || typed_param.mValues.empty())
 			{
 				new_value = true;
 				typed_param.mValues.push_back(value_t());
 			}
-
 			param_value_t& value = typed_param.mValues.back();
 
 			if (name_stack_range.first == name_stack_range.second)
 			{	// try to parse a known named value
 				std::string name;
 
-				if(name_value_lookup_t::valueNamesExist()
+				if(named_value_t::valueNamesExist()
 					&& parser.readValue(name)
-					&& name_value_lookup_t::getValueFromName(name, value.getValue()))
+					&& named_value_t::getValueFromName(name, value.getValue()))
 				{
 					typed_param.mValues.back().setValueName(name);
 					typed_param.setProvided();
@@ -1410,9 +1564,13 @@ namespace LLInitParam
 			}
 
 			// attempt to parse block...
-			if(value.deserializeBlock(parser, name_stack_range, new_name))
+			if(value.deserializeBlock(parser, new_name_stack_range, new_name))
 			{
 				typed_param.setProvided();
+				if (new_array_value)
+				{
+					name_stack_range.first->second = false;
+				}
 				return true;
 			}
 
@@ -1428,13 +1586,13 @@ namespace LLInitParam
 		static void serializeParam(const Param& param, Parser& parser, Parser::name_stack_t& name_stack, const Param* diff_param)
 		{
 			const self_t& typed_param = static_cast<const self_t&>(param);
-			if (!typed_param.isProvided() || name_stack.empty()) return;
+			if (!typed_param.isProvided()) return;
 
 			for (const_iterator it = typed_param.mValues.begin(), end_it = typed_param.mValues.end();
 				it != end_it;
 				++it)
 			{
-				name_stack.back().second = true;
+				name_stack.push_back(std::make_pair(std::string(), true));
 
 				std::string key = it->getValueName();
 				if (!key.empty())
@@ -1447,16 +1605,27 @@ namespace LLInitParam
 				{
 					it->serializeBlock(parser, name_stack, NULL);
 				}
+
+				name_stack.pop_back();
 			}
 		}
 
 		static void inspectParam(const Param& param, Parser& parser, Parser::name_stack_t& name_stack, S32 min_count, S32 max_count)
 		{
-			// I am a vector of blocks, so describe my contents recursively
-			param_value_t(value_t()).inspectBlock(parser, name_stack, min_count, max_count);
+			const param_value_t& value_param = param_value_t(value_t());
+
+			// tell parser about our actual type
+			parser.inspectValue<value_t>(name_stack, min_count, max_count, NULL);
+			// then tell it about string-based alternatives ("red", "blue", etc. for LLColor4)
+			if (named_value_t::getPossibleValues())
+			{
+				parser.inspectValue<std::string>(name_stack, min_count, max_count, named_value_t::getPossibleValues());
 		}
 
-		void set(value_assignment_t val, bool flag_as_provided = true)
+			value_param.inspectBlock(parser, name_stack, min_count, max_count);
+		}
+
+		void set(const container_t& val, bool flag_as_provided = true)
 		{
 			mValues = val;
 			setProvided(flag_as_provided);
@@ -1476,12 +1645,12 @@ namespace LLInitParam
 			return *this;
 		}
 
-		self_t& add(const typename name_value_lookup_t::name_t& name)
+		self_t& add(const typename named_value_t::name_t& name)
 		{
 			value_t value;
 
 			// try to parse a per type named value
-			if (name_value_lookup_t::getValueFromName(name, value))
+			if (named_value_t::getValueFromName(name, value))
 			{
 				add(value);
 				mValues.back().setValueName(name);
@@ -1490,12 +1659,10 @@ namespace LLInitParam
 		}
 
 		// implicit conversion
-		operator value_assignment_t() const { return mValues; } 
+		operator const container_t&() const { return mValues; } 
 		// explicit conversion
-		value_assignment_t operator()() const { return mValues; }
+		const container_t& operator()() const { return mValues; }
 
-		typedef typename container_t::iterator iterator;
-		typedef typename container_t::const_iterator const_iterator;
 		iterator begin() { return mValues.begin(); }
 		iterator end() { return mValues.end(); }
 		const_iterator begin() const { return mValues.begin(); }
@@ -1542,6 +1709,20 @@ namespace LLInitParam
 		}
 
 		container_t			mValues;
+
+	private:
+		void init( BlockDescriptor &block_descriptor, ParamDescriptor::validation_func_t validate_func, S32 min_count, S32 max_count, const char* name ) 
+		{
+			ParamDescriptorPtr param_descriptor = ParamDescriptorPtr(new ParamDescriptor(
+				block_descriptor.mCurrentBlockPtr->getHandleFromParam(this),
+				&mergeWith,
+				&deserializeParam,
+				&serializeParam,
+				validate_func,
+				&inspectParam,
+				min_count, max_count));
+			block_descriptor.addParam(param_descriptor, name);
+		}
 	};
 
 	template <typename DERIVED_BLOCK, typename BASE_BLOCK = BaseBlock>
@@ -1556,13 +1737,13 @@ namespace LLInitParam
 		// take all provided params from other and apply to self
 		bool overwriteFrom(const self_t& other)
 		{
-			return static_cast<DERIVED_BLOCK*>(this)->mergeBlock(selfBlockDescriptor(), other, true);
+			return static_cast<DERIVED_BLOCK*>(this)->mergeBlock(getBlockDescriptor(), other, true);
 		}
 
 		// take all provided params that are not already provided, and apply to self
 		bool fillFrom(const self_t& other)
 		{
-			return static_cast<DERIVED_BLOCK*>(this)->mergeBlock(selfBlockDescriptor(), other, false);
+			return static_cast<DERIVED_BLOCK*>(this)->mergeBlock(getBlockDescriptor(), other, false);
 		}
 
 		bool mergeBlockParam(bool source_provided, bool dest_provided, BlockDescriptor& block_data, const self_t& source, bool overwrite)
@@ -1580,7 +1761,7 @@ namespace LLInitParam
 		bool mergeBlock(BlockDescriptor& block_data, const self_t& other, bool overwrite)
 		{
 			mCurChoice = other.mCurChoice;
-			return base_block_t::mergeBlock(selfBlockDescriptor(), other, overwrite);
+			return base_block_t::mergeBlock(getBlockDescriptor(), other, overwrite);
 		}
 
 		// clear out old choice when param has changed
@@ -1601,38 +1782,38 @@ namespace LLInitParam
 			base_block_t::paramChanged(changed_param, user_provided);
 		}
 
-		virtual const BlockDescriptor& mostDerivedBlockDescriptor() const { return selfBlockDescriptor(); }
-		virtual BlockDescriptor& mostDerivedBlockDescriptor() { return selfBlockDescriptor(); }
+		virtual const BlockDescriptor& mostDerivedBlockDescriptor() const { return getBlockDescriptor(); }
+		virtual BlockDescriptor& mostDerivedBlockDescriptor() { return getBlockDescriptor(); }
 
 	protected:
 		ChoiceBlock()
 		:	mCurChoice(0)
 		{
-			BaseBlock::init(selfBlockDescriptor(), base_block_t::selfBlockDescriptor(), sizeof(DERIVED_BLOCK));
+			BaseBlock::init(getBlockDescriptor(), base_block_t::getBlockDescriptor(), sizeof(DERIVED_BLOCK));
 		}
 
 		// Alternatives are mutually exclusive wrt other Alternatives in the same block.  
 		// One alternative in a block will always have isChosen() == true.
 		// At most one alternative in a block will have isProvided() == true.
-		template <typename T, typename NAME_VALUE_LOOKUP = TypeValues<T> >
+		template <typename T, typename NAME_VALUE_LOOKUP = typename TypeValues<T>::type_value_t >
 		class Alternative : public TypedParam<T, NAME_VALUE_LOOKUP, false>
 		{
+			typedef TypedParam<T, NAME_VALUE_LOOKUP, false>	super_t;
+			typedef typename super_t::value_t				value_t;
+			typedef typename super_t::default_value_t		default_value_t;
+
 		public:
 			friend class ChoiceBlock<DERIVED_BLOCK>;
 
-			typedef Alternative<T, NAME_VALUE_LOOKUP>									self_t;
-			typedef TypedParam<T, NAME_VALUE_LOOKUP, false, IsBlock<ParamValue<T, NAME_VALUE_LOOKUP> >::value>		super_t;
-			typedef typename super_t::value_assignment_t								value_assignment_t;
-
 			using super_t::operator =;
 
-			explicit Alternative(const char* name = "", value_assignment_t val = defaultValue<T>())
-			:	super_t(DERIVED_BLOCK::selfBlockDescriptor(), name, val, NULL, 0, 1),
+			explicit Alternative(const char* name = "", const default_value_t& val = defaultValue<default_value_t>())
+			:	super_t(DERIVED_BLOCK::getBlockDescriptor(), name, val, NULL, 0, 1),
 				mOriginalValue(val)
 			{
 				// assign initial choice to first declared option
-				DERIVED_BLOCK* blockp = ((DERIVED_BLOCK*)DERIVED_BLOCK::selfBlockDescriptor().mCurrentBlockPtr);
-				if (LL_UNLIKELY(DERIVED_BLOCK::selfBlockDescriptor().mInitializationState == BlockDescriptor::INITIALIZING))
+				DERIVED_BLOCK* blockp = ((DERIVED_BLOCK*)DERIVED_BLOCK::getBlockDescriptor().mCurrentBlockPtr);
+				if (LL_UNLIKELY(DERIVED_BLOCK::getBlockDescriptor().mInitializationState == BlockDescriptor::INITIALIZING))
 				{
 					if(blockp->mCurChoice == 0)
 					{
@@ -1646,27 +1827,27 @@ namespace LLInitParam
 				static_cast<enclosing_block_t&>(Param::enclosingBlock()).paramChanged(*this, true);
 			}
 
-			void chooseAs(value_assignment_t val)
+			void chooseAs(const value_t& val)
 			{
 				super_t::set(val);
 			}
 
-			void operator =(value_assignment_t val)
+			void operator =(const value_t& val)
 			{
 				super_t::set(val);
 			}
 
-			void operator()(typename super_t::value_assignment_t val) 
+			void operator()(const value_t& val) 
 			{ 
 				super_t::set(val);
 			}
 
-			operator value_assignment_t() const 
+			operator const value_t&() const 
 			{
 				return (*this)();
 			} 
 
-			value_assignment_t operator()() const 
+			const value_t& operator()() const 
 			{ 
 				if (static_cast<enclosing_block_t&>(Param::enclosingBlock()).getCurrentChoice() == this)
 				{
@@ -1681,11 +1862,11 @@ namespace LLInitParam
 			}
 		
 		private:
-			T			mOriginalValue;
+			default_value_t mOriginalValue;
 		};
 
-	protected:
-		static BlockDescriptor& selfBlockDescriptor()
+	public:
+		static BlockDescriptor& getBlockDescriptor()
 		{
 			static BlockDescriptor sBlockDescriptor;
 			return sBlockDescriptor;
@@ -1705,6 +1886,8 @@ namespace LLInitParam
 	:	public BASE_BLOCK
 	{
 		typedef Block<DERIVED_BLOCK, BASE_BLOCK>	self_t;
+
+	protected:
 		typedef Block<DERIVED_BLOCK, BASE_BLOCK>	block_t;
 
 	public:
@@ -1713,80 +1896,82 @@ namespace LLInitParam
 		// take all provided params from other and apply to self
 		bool overwriteFrom(const self_t& other)
 		{
-			return static_cast<DERIVED_BLOCK*>(this)->mergeBlock(selfBlockDescriptor(), other, true);
+			return static_cast<DERIVED_BLOCK*>(this)->mergeBlock(getBlockDescriptor(), other, true);
 		}
 
 		// take all provided params that are not already provided, and apply to self
 		bool fillFrom(const self_t& other)
 		{
-			return static_cast<DERIVED_BLOCK*>(this)->mergeBlock(selfBlockDescriptor(), other, false);
+			return static_cast<DERIVED_BLOCK*>(this)->mergeBlock(getBlockDescriptor(), other, false);
 		}
 
-		virtual const BlockDescriptor& mostDerivedBlockDescriptor() const { return selfBlockDescriptor(); }
-		virtual BlockDescriptor& mostDerivedBlockDescriptor() { return selfBlockDescriptor(); }
+		virtual const BlockDescriptor& mostDerivedBlockDescriptor() const { return getBlockDescriptor(); }
+		virtual BlockDescriptor& mostDerivedBlockDescriptor() { return getBlockDescriptor(); }
 
 	protected:
 		Block()
 		{
 			//#pragma message("Parsing LLInitParam::Block")
-			BaseBlock::init(selfBlockDescriptor(), BASE_BLOCK::selfBlockDescriptor(), sizeof(DERIVED_BLOCK));
+			BaseBlock::init(getBlockDescriptor(), BASE_BLOCK::getBlockDescriptor(), sizeof(DERIVED_BLOCK));
 		}
 
 		//
 		// Nested classes for declaring parameters
 		//
-		template <typename T, typename NAME_VALUE_LOOKUP = TypeValues<T> >
+		template <typename T, typename NAME_VALUE_LOOKUP = typename TypeValues<T>::type_value_t >
 		class Optional : public TypedParam<T, NAME_VALUE_LOOKUP, false>
 		{
-		public:
-			typedef TypedParam<T, NAME_VALUE_LOOKUP, false, IsBlock<ParamValue<T, NAME_VALUE_LOOKUP> >::value>		super_t;
-			typedef typename super_t::value_assignment_t								value_assignment_t;
+			typedef TypedParam<T, NAME_VALUE_LOOKUP, false>		super_t;
+			typedef typename super_t::value_t					value_t;
+			typedef typename super_t::default_value_t			default_value_t;
 
+		public:
 			using super_t::operator();
 			using super_t::operator =;
 			
-			explicit Optional(const char* name = "", value_assignment_t val = defaultValue<T>())
-			:	super_t(DERIVED_BLOCK::selfBlockDescriptor(), name, val, NULL, 0, 1)
+			explicit Optional(const char* name = "", const default_value_t& val = defaultValue<default_value_t>())
+			:	super_t(DERIVED_BLOCK::getBlockDescriptor(), name, val, NULL, 0, 1)
 			{
 				//#pragma message("Parsing LLInitParam::Block::Optional")
 			}
 
-			Optional& operator =(value_assignment_t val)
+			Optional& operator =(const value_t& val)
 			{
 				set(val);
 				return *this;
 			}
 
-			DERIVED_BLOCK& operator()(value_assignment_t val)
+			DERIVED_BLOCK& operator()(const value_t& val)
 			{
 				super_t::set(val);
 				return static_cast<DERIVED_BLOCK&>(Param::enclosingBlock());
 			}
 		};
 
-		template <typename T, typename NAME_VALUE_LOOKUP = TypeValues<T> >
+		template <typename T, typename NAME_VALUE_LOOKUP = typename TypeValues<T>::type_value_t >
 		class Mandatory : public TypedParam<T, NAME_VALUE_LOOKUP, false>
 		{
-		public:
-			typedef TypedParam<T, NAME_VALUE_LOOKUP, false, IsBlock<ParamValue<T, NAME_VALUE_LOOKUP> >::value>		super_t;
+			typedef TypedParam<T, NAME_VALUE_LOOKUP, false>		super_t;
 			typedef Mandatory<T, NAME_VALUE_LOOKUP>										self_t;
-			typedef typename super_t::value_assignment_t								value_assignment_t;
+			typedef typename super_t::value_t					value_t;
+			typedef typename super_t::default_value_t			default_value_t;
 
+		public:
 			using super_t::operator();
 			using super_t::operator =;
 
 			// mandatory parameters require a name to be parseable
-			explicit Mandatory(const char* name = "", value_assignment_t val = defaultValue<T>())
-			:	super_t(DERIVED_BLOCK::selfBlockDescriptor(), name, val, &validate, 1, 1)
+			explicit Mandatory(const char* name = "", const default_value_t& val = defaultValue<default_value_t>())
+			:	super_t(DERIVED_BLOCK::getBlockDescriptor(), name, val, &validate, 1, 1)
 			{}
 
-			Mandatory& operator =(value_assignment_t val)
+			Mandatory& operator =(const value_t& val)
 			{
 				set(val);
 				return *this;
 			}
 
-			DERIVED_BLOCK& operator()(typename super_t::value_assignment_t val)
+			DERIVED_BLOCK& operator()(const value_t& val)
 			{
 				super_t::set(val);
 				return static_cast<DERIVED_BLOCK&>(Param::enclosingBlock());
@@ -1800,28 +1985,29 @@ namespace LLInitParam
 
 		};
 
-		template <typename T, typename RANGE = BaseBlock::AnyAmount, typename NAME_VALUE_LOOKUP = TypeValues<T> >
+		template <typename T, typename RANGE = BaseBlock::AnyAmount, typename NAME_VALUE_LOOKUP = typename TypeValues<T>::type_value_t >
 		class Multiple : public TypedParam<T, NAME_VALUE_LOOKUP, true>
 		{
-		public:
-			typedef TypedParam<T, NAME_VALUE_LOOKUP, true, IsBlock<ParamValue<T, NAME_VALUE_LOOKUP> >::value>	super_t;
+			typedef TypedParam<T, NAME_VALUE_LOOKUP, true>	super_t;
 			typedef Multiple<T, RANGE, NAME_VALUE_LOOKUP>							self_t;
 			typedef typename super_t::container_t									container_t;
-			typedef typename super_t::value_assignment_t							value_assignment_t;
+			typedef typename super_t::value_t				value_t;
+
+		public:
 			typedef typename super_t::iterator										iterator;
 			typedef typename super_t::const_iterator								const_iterator;
 
 			explicit Multiple(const char* name = "")
-			:	super_t(DERIVED_BLOCK::selfBlockDescriptor(), name, container_t(), &validate, RANGE::minCount, RANGE::maxCount)
+			:	super_t(DERIVED_BLOCK::getBlockDescriptor(), name, container_t(), &validate, RANGE::minCount, RANGE::maxCount)
 			{}
 
-			Multiple& operator =(value_assignment_t val)
+			Multiple& operator =(const container_t& val)
 			{
 				set(val);
 				return *this;
 			}
 
-			DERIVED_BLOCK& operator()(typename super_t::value_assignment_t val)
+			DERIVED_BLOCK& operator()(const container_t& val)
 			{
 				super_t::set(val);
 				return static_cast<DERIVED_BLOCK&>(Param::enclosingBlock());
@@ -1834,13 +2020,15 @@ namespace LLInitParam
 			}
 		};
 
-		class Deprecated : public Param
+		// can appear in data files, but will ignored during parsing
+		// cannot read or write in code
+		class Ignored : public Param
 		{
 		public:
-			explicit Deprecated(const char* name)
-			:	Param(DERIVED_BLOCK::selfBlockDescriptor().mCurrentBlockPtr)
+			explicit Ignored(const char* name)
+			:	Param(DERIVED_BLOCK::getBlockDescriptor().mCurrentBlockPtr)
 			{
-				BlockDescriptor& block_descriptor = DERIVED_BLOCK::selfBlockDescriptor();
+				BlockDescriptor& block_descriptor = DERIVED_BLOCK::getBlockDescriptor();
 				if (LL_UNLIKELY(block_descriptor.mInitializationState == BlockDescriptor::INITIALIZING))
 				{
 					ParamDescriptorPtr param_descriptor = ParamDescriptorPtr(new ParamDescriptor(
@@ -1851,11 +2039,11 @@ namespace LLInitParam
 													NULL,
 													NULL, 
 													0, S32_MAX));
-					BaseBlock::addParam(block_descriptor, param_descriptor, name);
+					block_descriptor.addParam(param_descriptor, name);
 				}
 			}
 			
-			static bool deserializeParam(Param& param, Parser& parser, const Parser::name_stack_range_t& name_stack_range, bool new_name)
+			static bool deserializeParam(Param& param, Parser& parser, Parser::name_stack_range_t& name_stack_range, bool new_name)
 			{
 				if (name_stack_range.first == name_stack_range.second)
 				{
@@ -1868,19 +2056,46 @@ namespace LLInitParam
 			}
 		};
 
-		// different semantics for documentation purposes, but functionally identical
-		typedef Deprecated Ignored;
+		// can appear in data files, or be written to in code, but data will be ignored
+		// cannot be read in code
+		class Deprecated : public Ignored
+		{
+		public:
+			explicit Deprecated(const char* name) : Ignored(name) {}
 
-	protected:
-		static BlockDescriptor& selfBlockDescriptor()
+			// dummy writer interfaces
+			template<typename T>
+			Deprecated& operator =(const T& val)
+		{
+				// do nothing
+				return *this;
+			}
+
+			template<typename T>
+			DERIVED_BLOCK& operator()(const T& val)
+			{
+				// do nothing
+				return static_cast<DERIVED_BLOCK&>(Param::enclosingBlock());
+			}
+
+			template<typename T>
+			void set(const T& val, bool flag_as_provided = true)
+			{
+				// do nothing
+			}
+		};
+
+	public:
+		static BlockDescriptor& getBlockDescriptor()
 		{
 			static BlockDescriptor sBlockDescriptor;
 			return sBlockDescriptor;
 		}
 
-		template <typename T, typename NAME_VALUE_LOOKUP, bool multiple, bool is_block>
+	protected:
+		template <typename T, typename NAME_VALUE_LOOKUP, bool multiple, typename is_block>
 		void changeDefault(TypedParam<T, NAME_VALUE_LOOKUP, multiple, is_block>& param, 
-			typename TypedParam<T, NAME_VALUE_LOOKUP, multiple, is_block>::value_assignment_t value)
+			const typename TypedParam<T, NAME_VALUE_LOOKUP, multiple, is_block>::value_t& value)
 		{
 			if (!param.isProvided())
 			{
@@ -1890,204 +2105,420 @@ namespace LLInitParam
 
 	};
 	
-	template <typename DERIVED_BLOCK, typename BASE_BLOCK = BaseBlock>
-	class BatchBlock
-	:	public Block<DERIVED_BLOCK, BASE_BLOCK>
+	template<typename T, typename BLOCK_T>
+	struct IsBlock<ParamValue<BaseBlock::Lazy<T, BaseBlock::IS_A_BLOCK>, BLOCK_T >, void>
+	{
+		typedef IS_A_BLOCK value_t;
+	};
+
+	template<typename T, typename BLOCK_T>
+	struct IsBlock<ParamValue<BaseBlock::Lazy<T, BaseBlock::NOT_A_BLOCK>, BLOCK_T >, void>
+	{
+		typedef NOT_BLOCK value_t;
+	};
+
+	template<typename T, typename BLOCK_IDENTIFIER>
+	struct IsBlock<ParamValue<BaseBlock::Atomic<T>, typename IsBlock<BaseBlock::Atomic<T> >::value_t >, BLOCK_IDENTIFIER>
+	{
+		typedef typename IsBlock<T>::value_t value_t;
+	};
+
+	template<typename T, typename BLOCK_IDENTIFIER>
+	struct IsBlock<ParamValue<BaseBlock::Sequential<T>, typename IsBlock<BaseBlock::Sequential<T> >::value_t >, BLOCK_IDENTIFIER>
 	{
+		typedef typename IsBlock<T>::value_t value_t;
+	};
+
+
+	template<typename T>
+	struct InnerMostType
+	{
+		typedef T value_t;
+	};
+
+	template<typename T>
+	struct InnerMostType<ParamValue<T, NOT_BLOCK> >
+	{
+		typedef typename InnerMostType<T>::value_t value_t;
+	};
+
+	template<typename T>
+	struct InnerMostType<ParamValue<T, IS_A_BLOCK> >
+	{
+		typedef typename InnerMostType<T>::value_t value_t;
+	};
+
+	template<typename T, typename BLOCK_T>
+	class ParamValue <BaseBlock::Atomic<T>, BLOCK_T>
+	{
+		typedef ParamValue <BaseBlock::Atomic<T>, BLOCK_T> self_t;
+
 	public:
-		typedef BatchBlock<DERIVED_BLOCK, BASE_BLOCK> self_t;
-		typedef Block<DERIVED_BLOCK, BASE_BLOCK> super_t;
+		typedef typename InnerMostType<T>::value_t	value_t;
+		typedef T									default_value_t;
 
-		BatchBlock()
+		ParamValue()
+		:	mValue(),
+			mValidated(false)
 		{}
 
-		bool deserializeBlock(Parser& p, Parser::name_stack_range_t name_stack_range, bool new_name)
+		ParamValue(const default_value_t& value)
+		:	mValue(value),
+			mValidated(false)
+		{}
+
+		void setValue(const value_t& val)
+		{
+			mValue.setValue(val);
+		}
+
+		const value_t& getValue() const
+		{
+			return mValue.getValue();
+		}
+
+		value_t& getValue()
+		{
+			return mValue.getValue();
+		}
+
+		bool deserializeBlock(Parser& p, Parser::name_stack_range_t& name_stack_range, bool new_name)
 		{
 			if (new_name)
 			{
-				// reset block
-				*static_cast<DERIVED_BLOCK*>(this) = defaultBatchValue();
+				resetToDefault();
 			}
-			return super_t::deserializeBlock(p, name_stack_range, new_name);
+			return mValue.deserializeBlock(p, name_stack_range, new_name);
 		}
 
-		bool mergeBlock(BlockDescriptor& block_data, const BaseBlock& other, bool overwrite)
+		void serializeBlock(Parser& p, Parser::name_stack_t& name_stack, const self_t* diff_block = NULL) const
 		{
-			if (overwrite)
+			const BaseBlock* base_block = diff_block
+				? &(diff_block->mValue)
+				: NULL;
+			mValue.serializeBlock(p, name_stack, base_block);
+		}
+
+		bool inspectBlock(Parser& p, Parser::name_stack_t name_stack = Parser::name_stack_t(), S32 min_count = 0, S32 max_count = S32_MAX) const
 			{
-				*static_cast<DERIVED_BLOCK*>(this) = defaultBatchValue();
-				// merge individual parameters into destination
-				return super_t::mergeBlock(super_t::selfBlockDescriptor(), other, overwrite);
+			return mValue.inspectBlock(p, name_stack, min_count, max_count);
 			}
-			return false;
+
+		bool mergeBlockParam(bool source_provided, bool dst_provided, BlockDescriptor& block_data, const self_t& source, bool overwrite)
+		{
+			if ((overwrite && source_provided) // new values coming in on top or...
+				|| (!overwrite && !dst_provided)) // values being pushed under with nothing already there
+			{
+				// clear away what is there and take the new stuff as a whole
+				resetToDefault();
+				return mValue.mergeBlock(block_data, source.getValue(), overwrite);
 		}
-	protected:
-		static const DERIVED_BLOCK& defaultBatchValue()
+			
+
+			return mValue.mergeBlock(block_data, source.getValue(), overwrite);
+		}
+
+		bool validateBlock(bool emit_errors = true) const
+		{
+			return mValue.validateBlock(emit_errors);
+		}
+
+		static BlockDescriptor& getBlockDescriptor()
+		{
+			return value_t::getBlockDescriptor();
+		}
+
+
+		mutable bool 	mValidated; // lazy validation flag
+
+	private:
+		void resetToDefault()
 		{
-			static DERIVED_BLOCK default_value;
-			return default_value;
+			static T default_value;
+			mValue = default_value;
 		}
+
+		T	mValue;
 	};
 
-	// FIXME: this specialization is not currently used, as it only matches against the BatchBlock base class
-	// and not the derived class with the actual params
-	template<typename DERIVED_BLOCK,
-			typename BASE_BLOCK,
-			typename NAME_VALUE_LOOKUP>
-	class ParamValue <BatchBlock<DERIVED_BLOCK, BASE_BLOCK>,
-					NAME_VALUE_LOOKUP,
-					true>
-	:	public NAME_VALUE_LOOKUP,
-		protected BatchBlock<DERIVED_BLOCK, BASE_BLOCK>
+	template<typename T>
+	class ParamValue <BaseBlock::Sequential<T>, IS_A_BLOCK>
 	{
+		typedef ParamValue <BaseBlock::Sequential<T>, IS_A_BLOCK> self_t;
+
 	public:
-		typedef BatchBlock<DERIVED_BLOCK, BASE_BLOCK> block_t;
-		typedef const BatchBlock<DERIVED_BLOCK, BASE_BLOCK>&	value_assignment_t;
-		typedef block_t value_t;
+		typedef typename InnerMostType<T>::value_t	value_t;
+		typedef T									default_value_t;
 
 		ParamValue()
-		:	block_t(),
+		:	mValue(),
 			mValidated(false)
-		{}
+		{
+			mCurParam = getBlockDescriptor().mAllParams.begin();
+		}
 
-		ParamValue(value_assignment_t other)
-		:	block_t(other),
+		ParamValue(const default_value_t& value)
+		:	mValue(value),
 			mValidated(false)
 		{
+			mCurParam = getBlockDescriptor().mAllParams.begin();
 		}
 
-		void setValue(value_assignment_t val)
+		void setValue(const value_t& val)
 		{
-			*this = val;
+			mValue.setValue(val);
 		}
 
-		value_assignment_t getValue() const
+		const value_t& getValue() const
 		{
-			return *this;
+			return mValue.getValue();
 		}
 
-		BatchBlock<DERIVED_BLOCK, BASE_BLOCK>& getValue()
+		value_t& getValue()
 		{
-			return *this;
+			return mValue.getValue();
 		}
 
-		operator value_assignment_t() const
+		bool deserializeBlock(Parser& p, Parser::name_stack_range_t& name_stack_range, bool new_name)
 		{
-			return *this;
+			if (new_name)
+			{
+				mCurParam = getBlockDescriptor().mAllParams.begin();
 		}
+			if (name_stack_range.first == name_stack_range.second 
+				&& mCurParam != getBlockDescriptor().mAllParams.end())
+			{
+				// deserialize to mCurParam
+				ParamDescriptor& pd = *(*mCurParam);
+				ParamDescriptor::deserialize_func_t deserialize_func = pd.mDeserializeFunc;
+				Param* paramp = mValue.getParamFromHandle(pd.mParamHandle);
 
-		value_assignment_t operator()() const
+				if (deserialize_func 
+					&& paramp 
+					&& deserialize_func(*paramp, p, name_stack_range, new_name))
 		{
-			return *this;
+					++mCurParam;
+					return true;
+				}
+				else
+				{
+					return false;
+				}
+		}
+			else
+			{
+				return mValue.deserializeBlock(p, name_stack_range, new_name);
+			}
+		}
+
+		void serializeBlock(Parser& p, Parser::name_stack_t& name_stack, const self_t* diff_block = NULL) const
+		{
+			const BaseBlock* base_block = diff_block
+				? &(diff_block->mValue)
+				: NULL;
+			mValue.serializeBlock(p, name_stack, base_block);
+		}
+
+		bool inspectBlock(Parser& p, Parser::name_stack_t name_stack = Parser::name_stack_t(), S32 min_count = 0, S32 max_count = S32_MAX) const
+		{
+			return mValue.inspectBlock(p, name_stack, min_count, max_count);
+		}
+
+		bool mergeBlockParam(bool source_provided, bool dst_provided, BlockDescriptor& block_data, const self_t& source, bool overwrite)
+		{
+			return mValue.mergeBlock(block_data, source.getValue(), overwrite);
+		}
+
+		bool validateBlock(bool emit_errors = true) const
+		{
+			return mValue.validateBlock(emit_errors);
+		}
+
+		static BlockDescriptor& getBlockDescriptor()
+		{
+			return value_t::getBlockDescriptor();
 		}
 
-	protected:
 		mutable bool 	mValidated; // lazy validation flag
+
+	private:
+
+		BlockDescriptor::all_params_list_t::iterator	mCurParam;
+		T												mValue;
 	};
 
-	template<typename T, bool IS_BLOCK>
-	class ParamValue <BaseBlock::Lazy<T>,
-					TypeValues<T>,
-					IS_BLOCK>
-	:	public IsBlock<T>::base_class_t
+	template<typename T>
+	class ParamValue <BaseBlock::Sequential<T>, NOT_BLOCK>
+	: public T
 	{
+		typedef ParamValue <BaseBlock::Sequential<T>, NOT_BLOCK> self_t;
+
 	public:
-		typedef ParamValue <BaseBlock::Lazy<T>, TypeValues<T>, false> self_t;
-		typedef const T& value_assignment_t;
-		typedef T value_t;
+		typedef typename InnerMostType<T>::value_t	value_t;
+		typedef T									default_value_t;
+
+		ParamValue()
+		:	T(),
+			mValidated(false)
+		{}
+	
+		ParamValue(const default_value_t& value)
+		:	T(value.getValue()),
+			mValidated(false)
+		{}
+
+		mutable bool 	mValidated; // lazy validation flag
+	};
+
+	template<typename T, typename BLOCK_T>
+	class ParamValue <BaseBlock::Lazy<T, IS_A_BLOCK>, BLOCK_T> 
+	{
+		typedef ParamValue <BaseBlock::Lazy<T, IS_A_BLOCK>, BLOCK_T> self_t;
+
+	public:
+		typedef typename InnerMostType<T>::value_t	value_t;
+		typedef LazyValue<T>						default_value_t;
 	
 		ParamValue()
 		:	mValue(),
 			mValidated(false)
 		{}
 
-		ParamValue(value_assignment_t other)
+		ParamValue(const default_value_t& other)
 		:	mValue(other),
 			mValidated(false)
 		{}
 
-		void setValue(value_assignment_t val)
+		ParamValue(const T& value)
+		:	mValue(value),
+			mValidated(false)
+		{}
+
+		void setValue(const value_t& val)
 		{
 			mValue.set(val);
 		}
 
-		value_assignment_t getValue() const
+		const value_t& getValue() const
 		{
-			return mValue.get();
+			return mValue.get().getValue();
 		}
 
-		T& getValue()
+		value_t& getValue()
 		{
-			return mValue.get();
+			return mValue.get().getValue();
 		}
 
-		operator value_assignment_t() const
+		bool deserializeBlock(Parser& p, Parser::name_stack_range_t& name_stack_range, bool new_name)
 		{
-			return mValue.get();
+			return mValue.get().deserializeBlock(p, name_stack_range, new_name);
 		}
 
-		value_assignment_t operator()() const
+		void serializeBlock(Parser& p, Parser::name_stack_t& name_stack, const self_t* diff_block = NULL) const
 		{
-			return mValue.get();
+			if (mValue.empty()) return;
+			
+			const BaseBlock* base_block = (diff_block && !diff_block->mValue.empty())
+											? &(diff_block->mValue.get().getValue())
+											: NULL;
+			mValue.get().serializeBlock(p, name_stack, base_block);
 		}
 
-		bool deserializeBlock(Parser& p, Parser::name_stack_range_t name_stack_range, bool new_name)
+		bool inspectBlock(Parser& p, Parser::name_stack_t name_stack = Parser::name_stack_t(), S32 min_count = 0, S32 max_count = S32_MAX) const
 		{
-			return mValue.get().deserializeBlock(p, name_stack_range, new_name);
+			return mValue.get().inspectBlock(p, name_stack, min_count, max_count);
 		}
 
-		void serializeBlock(Parser& p, Parser::name_stack_t& name_stack, const BaseBlock* diff_block = NULL) const
+		bool mergeBlockParam(bool source_provided, bool dst_provided, BlockDescriptor& block_data, const self_t& source, bool overwrite)
 		{
-			if (mValue.empty()) return;
+			return source.mValue.empty() || mValue.get().mergeBlock(block_data, source.getValue(), overwrite);
+		}
 			
-			mValue.get().serializeBlock(p, name_stack, diff_block);
+		bool validateBlock(bool emit_errors = true) const
+		{
+			return mValue.empty() || mValue.get().validateBlock(emit_errors);
 		}
 
-		bool inspectBlock(Parser& p, Parser::name_stack_t name_stack = Parser::name_stack_t(), S32 min_count = 0, S32 max_count = S32_MAX) const
+		static BlockDescriptor& getBlockDescriptor()
 		{
-			if (mValue.empty()) return false;
+			return value_t::getBlockDescriptor();
+		}
 
-			return mValue.get().inspectBlock(p, name_stack, min_count, max_count);
+		mutable bool 	mValidated; // lazy validation flag
+
+	private:
+		LazyValue<T>	mValue;
+	};
+
+	template<typename T, typename BLOCK_T>
+	class ParamValue <BaseBlock::Lazy<T, NOT_BLOCK>, BLOCK_T>
+		{
+		typedef ParamValue <BaseBlock::Lazy<T, NOT_BLOCK>, BLOCK_T> self_t;
+
+	public:
+		typedef typename InnerMostType<T>::value_t	value_t;
+		typedef LazyValue<T>						default_value_t;
+
+		ParamValue()
+		:	mValue(),
+			mValidated(false)
+		{}
+
+		ParamValue(const default_value_t& other)
+		:	mValue(other),
+			mValidated(false)
+		{}
+
+		ParamValue(const T& value)
+		:	mValue(value),
+			mValidated(false)
+		{}
+			
+		void setValue(const value_t& val)
+		{
+			mValue.set(val);
+		}
+
+		const value_t& getValue() const
+		{
+			return mValue.get().getValue();
+		}
+
+		value_t& getValue()
+		{
+			return mValue.get().getValue();
 		}
 
-	protected:
 		mutable bool 	mValidated; // lazy validation flag
 
 	private:
-		BaseBlock::Lazy<T>	mValue;
+		LazyValue<T>	mValue;
 	};
 
 	template <>
-	class ParamValue <LLSD,
-					TypeValues<LLSD>,
-					false>
-	:	public TypeValues<LLSD>,
-		public BaseBlock
+	class ParamValue <LLSD, NOT_BLOCK>
+	:	public BaseBlock
 	{
 	public:
-		typedef ParamValue<LLSD, TypeValues<LLSD>, false> self_t;
-		typedef const LLSD&	value_assignment_t;
+		typedef LLSD			value_t;
+		typedef LLSD			default_value_t;
 
 		ParamValue()
 		:	mValidated(false)
 		{}
 
-		ParamValue(value_assignment_t other)
+		ParamValue(const default_value_t& other)
 		:	mValue(other),
 			mValidated(false)
 		{}
 
-		void setValue(value_assignment_t val) { mValue = val; }
+		void setValue(const value_t& val) { mValue = val; }
 
-		value_assignment_t getValue() const { return mValue; }
+		const value_t& getValue() const { return mValue; }
 		LLSD& getValue() { return mValue; }
 
-		operator value_assignment_t() const { return mValue; }
-		value_assignment_t operator()() const { return mValue; }
-		
-
 		// block param interface
-		LL_COMMON_API bool deserializeBlock(Parser& p, Parser::name_stack_range_t name_stack_range, bool new_name);
+		LL_COMMON_API bool deserializeBlock(Parser& p, Parser::name_stack_range_t& name_stack_range, bool new_name);
 		LL_COMMON_API void serializeBlock(Parser& p, Parser::name_stack_t& name_stack, const BaseBlock* diff_block = NULL) const;
 		bool inspectBlock(Parser& p, Parser::name_stack_t name_stack = Parser::name_stack_t(), S32 min_count = 0, S32 max_count = S32_MAX) const
 		{
@@ -2106,8 +2537,7 @@ namespace LLInitParam
 
 	template<typename T>
 	class CustomParamValue
-	:	public Block<ParamValue<T, TypeValues<T> > >,
-		public TypeValues<T>
+	:	public Block<ParamValue<T> >
 	{
 	public:
 		typedef enum e_value_age
@@ -2117,20 +2547,21 @@ namespace LLInitParam
 			BLOCK_AUTHORITATIVE		// mValue is derived from the block parameters, which are authoritative
 		} EValueAge;
 
-		typedef ParamValue<T, TypeValues<T> >	derived_t;
+		typedef ParamValue<T>			derived_t;
 		typedef CustomParamValue<T>				self_t;
 		typedef Block<derived_t>				block_t;
-		typedef const T&						value_assignment_t;
+		typedef T						default_value_t;
 		typedef T								value_t;
+		typedef void					baseblock_base_class_t;
 
 
-		CustomParamValue(const T& value = T())
+		CustomParamValue(const default_value_t& value = T())
 		:	mValue(value),
 			mValueAge(VALUE_AUTHORITATIVE),
 			mValidated(false)
 		{}
 
-		bool deserializeBlock(Parser& parser, Parser::name_stack_range_t name_stack_range, bool new_name)
+		bool deserializeBlock(Parser& parser, Parser::name_stack_range_t& name_stack_range, bool new_name)
 		{
 			derived_t& typed_param = static_cast<derived_t&>(*this);
 			// try to parse direct value T
@@ -2141,8 +2572,6 @@ namespace LLInitParam
 					typed_param.mValueAge = VALUE_AUTHORITATIVE;
 					typed_param.updateBlockFromValue(false);
 
-					typed_param.clearValueName();
-
 					return true;
 				}
 			}
@@ -2156,18 +2585,8 @@ namespace LLInitParam
 			const derived_t& typed_param = static_cast<const derived_t&>(*this);
 			const derived_t* diff_param = static_cast<const derived_t*>(diff_block);
 			
-			std::string key = typed_param.getValueName();
-
-			// first try to write out name of name/value pair
-			if (!key.empty())
-			{
-				if (!diff_param || !ParamCompare<std::string>::equals(diff_param->getValueName(), key))
-				{
-					parser.writeValue(key, name_stack);
-				}
-			}
 			// then try to serialize value directly
-			else if (!diff_param || !ParamCompare<T>::equals(typed_param.getValue(), diff_param->getValue()))
+			if (!diff_param || !ParamCompare<T>::equals(typed_param.getValue(), diff_param->getValue()))
             {
 				
 				if (!parser.writeValue(typed_param.getValue(), name_stack)) 
@@ -2197,19 +2616,6 @@ namespace LLInitParam
 			}
 		}
 
-		bool inspectBlock(Parser& parser, Parser::name_stack_t name_stack = Parser::name_stack_t(), S32 min_count = 0, S32 max_count = S32_MAX) const
-		{
-			// first, inspect with actual type...
-			parser.inspectValue<T>(name_stack, min_count, max_count, NULL);
-			if (TypeValues<T>::getPossibleValues())
-			{
-				//...then inspect with possible string values...
-				parser.inspectValue<std::string>(name_stack, min_count, max_count, TypeValues<T>::getPossibleValues());
-			}
-			// then recursively inspect contents...
-			return block_t::inspectBlock(parser, name_stack, min_count, max_count);
-		}
-
 		bool validateBlock(bool emit_errors = true) const
 		{
 			if (mValueAge == VALUE_NEEDS_UPDATE)
@@ -2217,7 +2623,6 @@ namespace LLInitParam
 				if (block_t::validateBlock(emit_errors))
 				{
 					// clear stale keyword associated with old value
-					TypeValues<T>::clearValueName();
 					mValueAge = BLOCK_AUTHORITATIVE;
 					static_cast<derived_t*>(const_cast<self_t*>(this))->updateValueFromBlock();
 					return true;
@@ -2247,17 +2652,15 @@ namespace LLInitParam
 			}
 		}
 			
-		void setValue(value_assignment_t val)
+		void setValue(const value_t& val)
 		{
-			derived_t& typed_param = static_cast<derived_t&>(*this);
 			// set param version number to be up to date, so we ignore block contents
 			mValueAge = VALUE_AUTHORITATIVE;
 			mValue = val;
-			typed_param.clearValueName();
 			static_cast<derived_t*>(this)->updateBlockFromValue(false);
 		}
 
-		value_assignment_t getValue() const
+		const value_t& getValue() const
 		{
 			validateBlock(true);
 			return mValue;
@@ -2269,20 +2672,10 @@ namespace LLInitParam
 			return mValue;
 		}
 
-		operator value_assignment_t() const
-		{
-			return getValue();
-		}
-
-		value_assignment_t operator()() const
-		{
-			return getValue();
-		}
-
 	protected:
 
 		// use this from within updateValueFromBlock() to set the value without making it authoritative
-		void updateValue(value_assignment_t value)
+		void updateValue(const value_t& value)
 		{
 			mValue = value;
 		}
diff --git a/indra/llcommon/llinstancetracker.cpp b/indra/llcommon/llinstancetracker.cpp
index 5dc3ea5d7b..5dc3ea5d7b 100644..100755
--- a/indra/llcommon/llinstancetracker.cpp
+++ b/indra/llcommon/llinstancetracker.cpp
diff --git a/indra/llcommon/llinstancetracker.h b/indra/llcommon/llinstancetracker.h
index 403df08990..1eab270e3c 100644..100755
--- a/indra/llcommon/llinstancetracker.h
+++ b/indra/llcommon/llinstancetracker.h
@@ -43,7 +43,7 @@
  * semantics: one instance per process, rather than one instance per module as
  * sometimes happens with data simply declared static.
  */
-class LL_COMMON_API LLInstanceTrackerBase : public boost::noncopyable
+class LL_COMMON_API LLInstanceTrackerBase
 {
 protected:
 	/// Get a process-unique void* pointer slot for the specified type_info
@@ -210,6 +210,9 @@ protected:
 	virtual const KEY& getKey() const { return mInstanceKey; }
 
 private:
+	LLInstanceTracker( const LLInstanceTracker& );
+	const LLInstanceTracker& operator=( const LLInstanceTracker& );
+
 	void add_(KEY key) 
 	{ 
 		mInstanceKey = key; 
diff --git a/indra/llcommon/llkeythrottle.h b/indra/llcommon/llkeythrottle.h
index 1f576cc19e..1f576cc19e 100644..100755
--- a/indra/llcommon/llkeythrottle.h
+++ b/indra/llcommon/llkeythrottle.h
diff --git a/indra/llcommon/llkeyusetracker.h b/indra/llcommon/llkeyusetracker.h
index 1fb222dd40..1fb222dd40 100644..100755
--- a/indra/llcommon/llkeyusetracker.h
+++ b/indra/llcommon/llkeyusetracker.h
diff --git a/indra/llcommon/lllazy.cpp b/indra/llcommon/lllazy.cpp
index 29fa040387..29fa040387 100644..100755
--- a/indra/llcommon/lllazy.cpp
+++ b/indra/llcommon/lllazy.cpp
diff --git a/indra/llcommon/lllazy.h b/indra/llcommon/lllazy.h
index 5f3bbce79e..5f3bbce79e 100644..100755
--- a/indra/llcommon/lllazy.h
+++ b/indra/llcommon/lllazy.h
diff --git a/indra/llcommon/llleap.cpp b/indra/llcommon/llleap.cpp
index 0a57ef1c48..0a57ef1c48 100644..100755
--- a/indra/llcommon/llleap.cpp
+++ b/indra/llcommon/llleap.cpp
diff --git a/indra/llcommon/llleap.h b/indra/llcommon/llleap.h
index 1a1ad23d39..1a1ad23d39 100644..100755
--- a/indra/llcommon/llleap.h
+++ b/indra/llcommon/llleap.h
diff --git a/indra/llcommon/llleaplistener.cpp b/indra/llcommon/llleaplistener.cpp
index fa5730f112..fa5730f112 100644..100755
--- a/indra/llcommon/llleaplistener.cpp
+++ b/indra/llcommon/llleaplistener.cpp
diff --git a/indra/llcommon/llleaplistener.h b/indra/llcommon/llleaplistener.h
index 2193d81b9e..2193d81b9e 100644..100755
--- a/indra/llcommon/llleaplistener.h
+++ b/indra/llcommon/llleaplistener.h
diff --git a/indra/llcommon/lllinkedqueue.h b/indra/llcommon/lllinkedqueue.h
index 8336608809..8336608809 100644..100755
--- a/indra/llcommon/lllinkedqueue.h
+++ b/indra/llcommon/lllinkedqueue.h
diff --git a/indra/llcommon/lllistenerwrapper.h b/indra/llcommon/lllistenerwrapper.h
index 09d074abca..09d074abca 100644..100755
--- a/indra/llcommon/lllistenerwrapper.h
+++ b/indra/llcommon/lllistenerwrapper.h
diff --git a/indra/llcommon/llliveappconfig.cpp b/indra/llcommon/llliveappconfig.cpp
index 3a3dfa9f28..3a3dfa9f28 100644..100755
--- a/indra/llcommon/llliveappconfig.cpp
+++ b/indra/llcommon/llliveappconfig.cpp
diff --git a/indra/llcommon/llliveappconfig.h b/indra/llcommon/llliveappconfig.h
index 4fd7c26a07..4fd7c26a07 100644..100755
--- a/indra/llcommon/llliveappconfig.h
+++ b/indra/llcommon/llliveappconfig.h
diff --git a/indra/llcommon/lllivefile.cpp b/indra/llcommon/lllivefile.cpp
index c1987baf55..c1987baf55 100644..100755
--- a/indra/llcommon/lllivefile.cpp
+++ b/indra/llcommon/lllivefile.cpp
diff --git a/indra/llcommon/lllivefile.h b/indra/llcommon/lllivefile.h
index 320aa4bc3e..320aa4bc3e 100644..100755
--- a/indra/llcommon/lllivefile.h
+++ b/indra/llcommon/lllivefile.h
diff --git a/indra/llcommon/lllocalidhashmap.h b/indra/llcommon/lllocalidhashmap.h
index 8f4f91a560..8f4f91a560 100644..100755
--- a/indra/llcommon/lllocalidhashmap.h
+++ b/indra/llcommon/lllocalidhashmap.h
diff --git a/indra/llcommon/lllog.cpp b/indra/llcommon/lllog.cpp
index fc4058b5c9..fc4058b5c9 100644..100755
--- a/indra/llcommon/lllog.cpp
+++ b/indra/llcommon/lllog.cpp
diff --git a/indra/llcommon/lllog.h b/indra/llcommon/lllog.h
index 7964412e83..7964412e83 100644..100755
--- a/indra/llcommon/lllog.h
+++ b/indra/llcommon/lllog.h
diff --git a/indra/llcommon/lllslconstants.h b/indra/llcommon/lllslconstants.h
index 9f32598e61..9f32598e61 100644..100755
--- a/indra/llcommon/lllslconstants.h
+++ b/indra/llcommon/lllslconstants.h
diff --git a/indra/llcommon/llmap.h b/indra/llcommon/llmap.h
index 6294a15d3b..6294a15d3b 100644..100755
--- a/indra/llcommon/llmap.h
+++ b/indra/llcommon/llmap.h
diff --git a/indra/llcommon/llmd5.cpp b/indra/llcommon/llmd5.cpp
index 1409c55d1c..1409c55d1c 100644..100755
--- a/indra/llcommon/llmd5.cpp
+++ b/indra/llcommon/llmd5.cpp
diff --git a/indra/llcommon/llmd5.h b/indra/llcommon/llmd5.h
index 1526e6ac3c..1526e6ac3c 100644..100755
--- a/indra/llcommon/llmd5.h
+++ b/indra/llcommon/llmd5.h
diff --git a/indra/llcommon/llmemory.cpp b/indra/llcommon/llmemory.cpp
index 70ad10ad55..70ad10ad55 100644..100755
--- a/indra/llcommon/llmemory.cpp
+++ b/indra/llcommon/llmemory.cpp
diff --git a/indra/llcommon/llmemory.h b/indra/llcommon/llmemory.h
index e725bdd9fa..e725bdd9fa 100644..100755
--- a/indra/llcommon/llmemory.h
+++ b/indra/llcommon/llmemory.h
diff --git a/indra/llcommon/llmemorystream.cpp b/indra/llcommon/llmemorystream.cpp
index 723d94f025..723d94f025 100644..100755
--- a/indra/llcommon/llmemorystream.cpp
+++ b/indra/llcommon/llmemorystream.cpp
diff --git a/indra/llcommon/llmemorystream.h b/indra/llcommon/llmemorystream.h
index e28f012192..e28f012192 100644..100755
--- a/indra/llcommon/llmemorystream.h
+++ b/indra/llcommon/llmemorystream.h
diff --git a/indra/llcommon/llmetricperformancetester.cpp b/indra/llcommon/llmetricperformancetester.cpp
index 41d3eb0bf3..731e58bd20 100644..100755
--- a/indra/llcommon/llmetricperformancetester.cpp
+++ b/indra/llcommon/llmetricperformancetester.cpp
@@ -100,7 +100,7 @@ LLSD LLMetricPerformanceTesterBasic::analyzeMetricPerformanceLog(std::istream& i
 	LLSD ret;
 	LLSD cur;
 	
-	while (!is.eof() && LLSDSerialize::fromXML(cur, is))
+	while (!is.eof() && LLSDParser::PARSE_FAILURE != LLSDSerialize::fromXML(cur, is))
 	{
 		for (LLSD::map_iterator iter = cur.beginMap(); iter != cur.endMap(); ++iter)
 		{
diff --git a/indra/llcommon/llmetricperformancetester.h b/indra/llcommon/llmetricperformancetester.h
index 1a18cdf36f..1a18cdf36f 100644..100755
--- a/indra/llcommon/llmetricperformancetester.h
+++ b/indra/llcommon/llmetricperformancetester.h
diff --git a/indra/llcommon/llmetrics.cpp b/indra/llcommon/llmetrics.cpp
index 3078139f43..3078139f43 100644..100755
--- a/indra/llcommon/llmetrics.cpp
+++ b/indra/llcommon/llmetrics.cpp
diff --git a/indra/llcommon/llmetrics.h b/indra/llcommon/llmetrics.h
index 4f0ae56338..4f0ae56338 100644..100755
--- a/indra/llcommon/llmetrics.h
+++ b/indra/llcommon/llmetrics.h
diff --git a/indra/llcommon/llmortician.cpp b/indra/llcommon/llmortician.cpp
index 287f096eae..287f096eae 100644..100755
--- a/indra/llcommon/llmortician.cpp
+++ b/indra/llcommon/llmortician.cpp
diff --git a/indra/llcommon/llmortician.h b/indra/llcommon/llmortician.h
index 319955ef93..319955ef93 100644..100755
--- a/indra/llcommon/llmortician.h
+++ b/indra/llcommon/llmortician.h
diff --git a/indra/llcommon/llnametable.h b/indra/llcommon/llnametable.h
index d3283543f3..d3283543f3 100644..100755
--- a/indra/llcommon/llnametable.h
+++ b/indra/llcommon/llnametable.h
diff --git a/indra/llcommon/lloptioninterface.cpp b/indra/llcommon/lloptioninterface.cpp
index 23fae76dc0..23fae76dc0 100644..100755
--- a/indra/llcommon/lloptioninterface.cpp
+++ b/indra/llcommon/lloptioninterface.cpp
diff --git a/indra/llcommon/lloptioninterface.h b/indra/llcommon/lloptioninterface.h
index 93b465db32..93b465db32 100644..100755
--- a/indra/llcommon/lloptioninterface.h
+++ b/indra/llcommon/lloptioninterface.h
diff --git a/indra/llcommon/llpointer.h b/indra/llcommon/llpointer.h
index 88c09c8dca..88c09c8dca 100644..100755
--- a/indra/llcommon/llpointer.h
+++ b/indra/llcommon/llpointer.h
diff --git a/indra/llcommon/llpreprocessor.h b/indra/llcommon/llpreprocessor.h
index 7fdb537ab5..7fdb537ab5 100644..100755
--- a/indra/llcommon/llpreprocessor.h
+++ b/indra/llcommon/llpreprocessor.h
diff --git a/indra/llcommon/llpriqueuemap.h b/indra/llcommon/llpriqueuemap.h
index da997c7b04..da997c7b04 100644..100755
--- a/indra/llcommon/llpriqueuemap.h
+++ b/indra/llcommon/llpriqueuemap.h
diff --git a/indra/llcommon/llprocess.cpp b/indra/llcommon/llprocess.cpp
index 715df36f39..715df36f39 100644..100755
--- a/indra/llcommon/llprocess.cpp
+++ b/indra/llcommon/llprocess.cpp
diff --git a/indra/llcommon/llprocess.h b/indra/llcommon/llprocess.h
index d711ce2f74..d711ce2f74 100644..100755
--- a/indra/llcommon/llprocess.h
+++ b/indra/llcommon/llprocess.h
diff --git a/indra/llcommon/llprocessor.cpp b/indra/llcommon/llprocessor.cpp
index fd8f603d21..fd8f603d21 100644..100755
--- a/indra/llcommon/llprocessor.cpp
+++ b/indra/llcommon/llprocessor.cpp
diff --git a/indra/llcommon/llprocessor.h b/indra/llcommon/llprocessor.h
index 6364d3c8bb..6364d3c8bb 100644..100755
--- a/indra/llcommon/llprocessor.h
+++ b/indra/llcommon/llprocessor.h
diff --git a/indra/llcommon/llptrskiplist.h b/indra/llcommon/llptrskiplist.h
index 67c7cde352..67c7cde352 100644..100755
--- a/indra/llcommon/llptrskiplist.h
+++ b/indra/llcommon/llptrskiplist.h
diff --git a/indra/llcommon/llptrskipmap.h b/indra/llcommon/llptrskipmap.h
index 94bc71ec55..94bc71ec55 100644..100755
--- a/indra/llcommon/llptrskipmap.h
+++ b/indra/llcommon/llptrskipmap.h
diff --git a/indra/llcommon/llptrto.cpp b/indra/llcommon/llptrto.cpp
index b270291bd6..b270291bd6 100644..100755
--- a/indra/llcommon/llptrto.cpp
+++ b/indra/llcommon/llptrto.cpp
diff --git a/indra/llcommon/llptrto.h b/indra/llcommon/llptrto.h
index 7091d36f6b..7091d36f6b 100644..100755
--- a/indra/llcommon/llptrto.h
+++ b/indra/llcommon/llptrto.h
diff --git a/indra/llcommon/llqueuedthread.cpp b/indra/llcommon/llqueuedthread.cpp
index abf47a0f57..abf47a0f57 100644..100755
--- a/indra/llcommon/llqueuedthread.cpp
+++ b/indra/llcommon/llqueuedthread.cpp
diff --git a/indra/llcommon/llqueuedthread.h b/indra/llcommon/llqueuedthread.h
index d3704b0fe2..d3704b0fe2 100644..100755
--- a/indra/llcommon/llqueuedthread.h
+++ b/indra/llcommon/llqueuedthread.h
diff --git a/indra/llcommon/llrand.cpp b/indra/llcommon/llrand.cpp
index cb28a8f5c3..cb28a8f5c3 100644..100755
--- a/indra/llcommon/llrand.cpp
+++ b/indra/llcommon/llrand.cpp
diff --git a/indra/llcommon/llrand.h b/indra/llcommon/llrand.h
index ad317d5bf7..ad317d5bf7 100644..100755
--- a/indra/llcommon/llrand.h
+++ b/indra/llcommon/llrand.h
diff --git a/indra/llcommon/llrefcount.cpp b/indra/llcommon/llrefcount.cpp
index e1876599fc..e1876599fc 100644..100755
--- a/indra/llcommon/llrefcount.cpp
+++ b/indra/llcommon/llrefcount.cpp
diff --git a/indra/llcommon/llrefcount.h b/indra/llcommon/llrefcount.h
index 8eb5d53f3f..32ae15435a 100644..100755
--- a/indra/llcommon/llrefcount.h
+++ b/indra/llcommon/llrefcount.h
@@ -27,6 +27,7 @@
 #define LLREFCOUNT_H
 
 #include <boost/noncopyable.hpp>
+#include <boost/intrusive_ptr.hpp>
 
 #define LL_REF_COUNT_DEBUG 0
 #if LL_REF_COUNT_DEBUG
@@ -86,4 +87,22 @@ private:
 #endif
 };
 
+/**
+ * intrusive pointer support
+ * this allows you to use boost::intrusive_ptr with any LLRefCount-derived type
+ */
+namespace boost
+{
+	inline void intrusive_ptr_add_ref(LLRefCount* p)
+	{
+		p->ref();
+	}
+
+	inline void intrusive_ptr_release(LLRefCount* p)
+	{
+		p->unref();
+	}
+};
+
+
 #endif
diff --git a/indra/llcommon/llregistry.h b/indra/llcommon/llregistry.h
index 853c427a13..bb0d60247e 100644..100755
--- a/indra/llcommon/llregistry.h
+++ b/indra/llcommon/llregistry.h
@@ -307,6 +307,10 @@ public:
 		virtual ~StaticRegistrar() {}
 		StaticRegistrar(ref_const_key_t key, ref_const_value_t value)
 		{
+			if (singleton_t::instance().exists(key))
+			{
+				llerrs << "Duplicate registry entry under key \"" << key << "\"" << llendl;
+			}
 			singleton_t::instance().mStaticScope->add(key, value);
 		}
 	};
diff --git a/indra/llcommon/llrun.cpp b/indra/llcommon/llrun.cpp
index f5d3f302fa..f5d3f302fa 100644..100755
--- a/indra/llcommon/llrun.cpp
+++ b/indra/llcommon/llrun.cpp
diff --git a/indra/llcommon/llrun.h b/indra/llcommon/llrun.h
index a117405366..a117405366 100644..100755
--- a/indra/llcommon/llrun.h
+++ b/indra/llcommon/llrun.h
diff --git a/indra/llcommon/llsafehandle.h b/indra/llcommon/llsafehandle.h
index 8d52d9bb15..8d52d9bb15 100644..100755
--- a/indra/llcommon/llsafehandle.h
+++ b/indra/llcommon/llsafehandle.h
diff --git a/indra/llcommon/llsd.cpp b/indra/llcommon/llsd.cpp
index 8276ec836a..8276ec836a 100644..100755
--- a/indra/llcommon/llsd.cpp
+++ b/indra/llcommon/llsd.cpp
diff --git a/indra/llcommon/llsd.h b/indra/llcommon/llsd.h
index 5eb69059ac..5eb69059ac 100644..100755
--- a/indra/llcommon/llsd.h
+++ b/indra/llcommon/llsd.h
diff --git a/indra/llcommon/llsdparam.cpp b/indra/llcommon/llsdparam.cpp
index 0e29873bb0..9f4460a988 100644..100755
--- a/indra/llcommon/llsdparam.cpp
+++ b/indra/llcommon/llsdparam.cpp
@@ -223,10 +223,14 @@ LLSD& LLParamSDParserUtilities::getSDWriteNode(LLSD& input, LLInitParam::Parser:
 	{
 		bool new_traversal = it->second;
 
-		LLSD* child_sd = it->first.empty() ? sd_to_write : &(*sd_to_write)[it->first];
-
-		if (child_sd->isArray())
+		LLSD* child_sd;
+		if (it->first.empty())
 		{
+			child_sd = sd_to_write;
+			if (child_sd->isUndefined())
+			{
+				*child_sd = LLSD::emptyArray();
+			}
 			if (new_traversal)
 			{
 				// write to new element at end
@@ -240,22 +244,7 @@ LLSD& LLParamSDParserUtilities::getSDWriteNode(LLSD& input, LLInitParam::Parser:
 		}
 		else
 		{
-			if (new_traversal 
-				&& child_sd->isDefined() 
-				&& !child_sd->isArray())
-			{
-				// copy child contents into first element of an array
-				LLSD new_array = LLSD::emptyArray();
-				new_array.append(*child_sd);
-				// assign array to slot that previously held the single value
-				*child_sd = new_array;
-				// return next element in that array
-				sd_to_write = &((*child_sd)[1]);
-			}
-			else
-			{
-				sd_to_write = child_sd;
-			}
+			sd_to_write = &(*sd_to_write)[it->first];
 		}
 		it->second = false;
 	}
@@ -283,8 +272,9 @@ void LLParamSDParserUtilities::readSDValues(read_sd_cb_t cb, const LLSD& sd, LLI
 			it != sd.endArray();
 			++it)
 		{
-			stack.back().second = true;
+			stack.push_back(make_pair(std::string(), true));
 			readSDValues(cb, *it, stack);
+			stack.pop_back();
 		}
 	}
 	else if (sd.isUndefined())
@@ -313,8 +303,14 @@ namespace LLInitParam
 {
 	// LLSD specialization
 	// block param interface
-	bool ParamValue<LLSD, TypeValues<LLSD>, false>::deserializeBlock(Parser& p, Parser::name_stack_range_t name_stack, bool new_name)
+	bool ParamValue<LLSD, NOT_BLOCK>::deserializeBlock(Parser& p, Parser::name_stack_range_t& name_stack, bool new_name)
 	{
+		if (name_stack.first == name_stack.second
+			&& p.readValue<LLSD>(mValue))
+		{
+			return true;
+		}
+
 		LLSD& sd = LLParamSDParserUtilities::getSDWriteNode(mValue, name_stack);
 
 		LLSD::String string;
@@ -328,15 +324,18 @@ namespace LLInitParam
 	}
 
 	//static
-	void ParamValue<LLSD, TypeValues<LLSD>, false>::serializeElement(Parser& p, const LLSD& sd, Parser::name_stack_t& name_stack)
+	void ParamValue<LLSD, NOT_BLOCK>::serializeElement(Parser& p, const LLSD& sd, Parser::name_stack_t& name_stack)
 	{
 		p.writeValue<LLSD::String>(sd.asString(), name_stack);
 	}
 
-	void ParamValue<LLSD, TypeValues<LLSD>, false>::serializeBlock(Parser& p, Parser::name_stack_t& name_stack, const BaseBlock* diff_block) const
+	void ParamValue<LLSD, NOT_BLOCK>::serializeBlock(Parser& p, Parser::name_stack_t& name_stack, const BaseBlock* diff_block) const
 	{
-		// read from LLSD value and serialize out to parser (which could be LLSD, XUI, etc)
-		Parser::name_stack_t stack;
-		LLParamSDParserUtilities::readSDValues(boost::bind(&serializeElement, boost::ref(p), _1, _2), mValue, stack);
+		// attempt to write LLSD out directly
+		if (!p.writeValue<LLSD>(mValue, name_stack))
+		{
+			// otherwise read from LLSD value and serialize out to parser (which could be LLSD, XUI, etc)
+			LLParamSDParserUtilities::readSDValues(boost::bind(&serializeElement, boost::ref(p), _1, _2), mValue, name_stack);
+		}
 	}
 }
diff --git a/indra/llcommon/llsdparam.h b/indra/llcommon/llsdparam.h
index 6ef5debd7b..6ef5debd7b 100644..100755
--- a/indra/llcommon/llsdparam.h
+++ b/indra/llcommon/llsdparam.h
diff --git a/indra/llcommon/llsdserialize.cpp b/indra/llcommon/llsdserialize.cpp
index 6b549e4b6f..ad4fce6f35 100644..100755
--- a/indra/llcommon/llsdserialize.cpp
+++ b/indra/llcommon/llsdserialize.cpp
@@ -1453,8 +1453,8 @@ S32 LLSDBinaryFormatter::format(const LLSD& data, std::ostream& ostr, U32 option
 	case LLSD::TypeUUID:
 	{
 		ostr.put('u');
-		LLSD::UUID value = data.asUUID();
-		ostr.write((const char*)(&value.mData), UUID_BYTES);
+		LLUUID temp = data.asUUID();
+		ostr.write((const char*)(&(temp.mData)), UUID_BYTES);
 		break;
 	}
 
diff --git a/indra/llcommon/llsdserialize.h b/indra/llcommon/llsdserialize.h
index 86e3fc864c..e7a5507385 100644..100755
--- a/indra/llcommon/llsdserialize.h
+++ b/indra/llcommon/llsdserialize.h
@@ -300,7 +300,7 @@ public:
 	/** 
 	 * @brief Constructor
 	 */
-	LLSDXMLParser();
+	LLSDXMLParser(bool emit_errors=true);
 
 protected:
 	/** 
@@ -747,25 +747,25 @@ public:
 		return f->format(sd, str, LLSDFormatter::OPTIONS_PRETTY);
 	}
 
-	static S32 fromXMLEmbedded(LLSD& sd, std::istream& str)
+	static S32 fromXMLEmbedded(LLSD& sd, std::istream& str, bool emit_errors=true)
 	{
 		// no need for max_bytes since xml formatting is not
 		// subvertable by bad sizes.
-		LLPointer<LLSDXMLParser> p = new LLSDXMLParser;
+		LLPointer<LLSDXMLParser> p = new LLSDXMLParser(emit_errors);
 		return p->parse(str, sd, LLSDSerialize::SIZE_UNLIMITED);
 	}
 	// Line oriented parser, 30% faster than fromXML(), but can
 	// only be used when you know you have the complete XML
 	// document available in the stream.
-	static S32 fromXMLDocument(LLSD& sd, std::istream& str)
+	static S32 fromXMLDocument(LLSD& sd, std::istream& str, bool emit_errors=true)
 	{
-		LLPointer<LLSDXMLParser> p = new LLSDXMLParser();
+		LLPointer<LLSDXMLParser> p = new LLSDXMLParser(emit_errors);
 		return p->parseLines(str, sd);
 	}
-	static S32 fromXML(LLSD& sd, std::istream& str)
+	static S32 fromXML(LLSD& sd, std::istream& str, bool emit_errors=true)
 	{
-		return fromXMLEmbedded(sd, str);
-//		return fromXMLDocument(sd, str);
+		return fromXMLEmbedded(sd, str, emit_errors);
+//		return fromXMLDocument(sd, str, emit_errors);
 	}
 
 	/*
diff --git a/indra/llcommon/llsdserialize_xml.cpp b/indra/llcommon/llsdserialize_xml.cpp
index 34b3dbb99a..cef743a7be 100644..100755
--- a/indra/llcommon/llsdserialize_xml.cpp
+++ b/indra/llcommon/llsdserialize_xml.cpp
@@ -250,7 +250,7 @@ std::string LLSDXMLFormatter::escapeString(const std::string& in)
 class LLSDXMLParser::Impl
 {
 public:
-	Impl();
+	Impl(bool emit_errors);
 	~Impl();
 	
 	S32 parse(std::istream& input, LLSD& data);
@@ -294,6 +294,7 @@ private:
 	
 	static const XML_Char* findAttribute(const XML_Char* name, const XML_Char** pairs);
 	
+	bool mEmitErrors;
 
 	XML_Parser	mParser;
 
@@ -315,7 +316,8 @@ private:
 };
 
 
-LLSDXMLParser::Impl::Impl()
+LLSDXMLParser::Impl::Impl(bool emit_errors)
+	: mEmitErrors(emit_errors)
 {
 	mParser = XML_ParserCreate(NULL);
 	reset();
@@ -402,7 +404,10 @@ S32 LLSDXMLParser::Impl::parse(std::istream& input, LLSD& data)
 		{
 			((char*) buffer)[count ? count - 1 : 0] = '\0';
 		}
-		llinfos << "LLSDXMLParser::Impl::parse: XML_STATUS_ERROR parsing:" << (char*) buffer << llendl;
+		if (mEmitErrors)
+		{
+			llinfos << "LLSDXMLParser::Impl::parse: XML_STATUS_ERROR parsing:" << (char*) buffer << llendl;
+		}
 		data = LLSD();
 		return LLSDParser::PARSE_FAILURE;
 	}
@@ -480,7 +485,10 @@ S32 LLSDXMLParser::Impl::parseLines(std::istream& input, LLSD& data)
 	if (status == XML_STATUS_ERROR  
 		&& !mGracefullStop)
 	{
-		llinfos << "LLSDXMLParser::Impl::parseLines: XML_STATUS_ERROR" << llendl;
+		if (mEmitErrors)
+		{
+			llinfos << "LLSDXMLParser::Impl::parseLines: XML_STATUS_ERROR" << llendl;
+		}
 		return LLSDParser::PARSE_FAILURE;
 	}
 
@@ -897,7 +905,7 @@ LLSDXMLParser::Impl::Element LLSDXMLParser::Impl::readElement(const XML_Char* na
 /**
  * LLSDXMLParser
  */
-LLSDXMLParser::LLSDXMLParser() : impl(* new Impl)
+LLSDXMLParser::LLSDXMLParser(bool emit_errors /* = true */) : impl(* new Impl(emit_errors))
 {
 }
 
diff --git a/indra/llcommon/llsdserialize_xml.h b/indra/llcommon/llsdserialize_xml.h
index dcc5f3d3c7..dcc5f3d3c7 100644..100755
--- a/indra/llcommon/llsdserialize_xml.h
+++ b/indra/llcommon/llsdserialize_xml.h
diff --git a/indra/llcommon/llsdutil.cpp b/indra/llcommon/llsdutil.cpp
index 803417d368..803417d368 100644..100755
--- a/indra/llcommon/llsdutil.cpp
+++ b/indra/llcommon/llsdutil.cpp
diff --git a/indra/llcommon/llsdutil.h b/indra/llcommon/llsdutil.h
index 532d3f9341..532d3f9341 100644..100755
--- a/indra/llcommon/llsdutil.h
+++ b/indra/llcommon/llsdutil.h
diff --git a/indra/llcommon/llsecondlifeurls.cpp b/indra/llcommon/llsecondlifeurls.cpp
index 9154e05e43..9154e05e43 100644..100755
--- a/indra/llcommon/llsecondlifeurls.cpp
+++ b/indra/llcommon/llsecondlifeurls.cpp
diff --git a/indra/llcommon/llsecondlifeurls.h b/indra/llcommon/llsecondlifeurls.h
index 62f357ffed..62f357ffed 100644..100755
--- a/indra/llcommon/llsecondlifeurls.h
+++ b/indra/llcommon/llsecondlifeurls.h
diff --git a/indra/llcommon/llsimplehash.h b/indra/llcommon/llsimplehash.h
index 727b4568d8..727b4568d8 100644..100755
--- a/indra/llcommon/llsimplehash.h
+++ b/indra/llcommon/llsimplehash.h
diff --git a/indra/llcommon/llsingleton.cpp b/indra/llcommon/llsingleton.cpp
index eb8e2c9456..eb8e2c9456 100644..100755
--- a/indra/llcommon/llsingleton.cpp
+++ b/indra/llcommon/llsingleton.cpp
diff --git a/indra/llcommon/llsingleton.h b/indra/llcommon/llsingleton.h
index 49d99f2cd0..49d99f2cd0 100644..100755
--- a/indra/llcommon/llsingleton.h
+++ b/indra/llcommon/llsingleton.h
diff --git a/indra/llcommon/llskiplist.h b/indra/llcommon/llskiplist.h
index ed132381f9..ed132381f9 100644..100755
--- a/indra/llcommon/llskiplist.h
+++ b/indra/llcommon/llskiplist.h
diff --git a/indra/llcommon/llskipmap.h b/indra/llcommon/llskipmap.h
index 49ff2928d1..49ff2928d1 100644..100755
--- a/indra/llcommon/llskipmap.h
+++ b/indra/llcommon/llskipmap.h
diff --git a/indra/llcommon/llsmoothstep.h b/indra/llcommon/llsmoothstep.h
index 1f97a3ec89..1f97a3ec89 100644..100755
--- a/indra/llcommon/llsmoothstep.h
+++ b/indra/llcommon/llsmoothstep.h
diff --git a/indra/llcommon/llsortedvector.h b/indra/llcommon/llsortedvector.h
index 391b82ee44..391b82ee44 100644..100755
--- a/indra/llcommon/llsortedvector.h
+++ b/indra/llcommon/llsortedvector.h
diff --git a/indra/llcommon/llstack.h b/indra/llcommon/llstack.h
index 315de6ba2d..315de6ba2d 100644..100755
--- a/indra/llcommon/llstack.h
+++ b/indra/llcommon/llstack.h
diff --git a/indra/llcommon/llstacktrace.cpp b/indra/llcommon/llstacktrace.cpp
index ccd7ef91c2..ccd7ef91c2 100644..100755
--- a/indra/llcommon/llstacktrace.cpp
+++ b/indra/llcommon/llstacktrace.cpp
diff --git a/indra/llcommon/llstacktrace.h b/indra/llcommon/llstacktrace.h
index ca72c64c5d..ca72c64c5d 100644..100755
--- a/indra/llcommon/llstacktrace.h
+++ b/indra/llcommon/llstacktrace.h
diff --git a/indra/llcommon/llstat.cpp b/indra/llcommon/llstat.cpp
index 3678c8e1c1..3678c8e1c1 100644..100755
--- a/indra/llcommon/llstat.cpp
+++ b/indra/llcommon/llstat.cpp
diff --git a/indra/llcommon/llstat.h b/indra/llcommon/llstat.h
index 38377a010b..38377a010b 100644..100755
--- a/indra/llcommon/llstat.h
+++ b/indra/llcommon/llstat.h
diff --git a/indra/llcommon/llstatenums.h b/indra/llcommon/llstatenums.h
index 81c4085d16..81c4085d16 100644..100755
--- a/indra/llcommon/llstatenums.h
+++ b/indra/llcommon/llstatenums.h
diff --git a/indra/llcommon/llstl.h b/indra/llcommon/llstl.h
index d3941e1bc9..d3941e1bc9 100644..100755
--- a/indra/llcommon/llstl.h
+++ b/indra/llcommon/llstl.h
diff --git a/indra/llcommon/llstreamqueue.cpp b/indra/llcommon/llstreamqueue.cpp
index 1116a2b6a2..1116a2b6a2 100644..100755
--- a/indra/llcommon/llstreamqueue.cpp
+++ b/indra/llcommon/llstreamqueue.cpp
diff --git a/indra/llcommon/llstreamqueue.h b/indra/llcommon/llstreamqueue.h
index 0726bad175..0726bad175 100644..100755
--- a/indra/llcommon/llstreamqueue.h
+++ b/indra/llcommon/llstreamqueue.h
diff --git a/indra/llcommon/llstreamtools.cpp b/indra/llcommon/llstreamtools.cpp
index d7a6f47932..d7a6f47932 100644..100755
--- a/indra/llcommon/llstreamtools.cpp
+++ b/indra/llcommon/llstreamtools.cpp
diff --git a/indra/llcommon/llstreamtools.h b/indra/llcommon/llstreamtools.h
index 1b04bf91d7..1b04bf91d7 100644..100755
--- a/indra/llcommon/llstreamtools.h
+++ b/indra/llcommon/llstreamtools.h
diff --git a/indra/llcommon/llstrider.h b/indra/llcommon/llstrider.h
index ed9284d2c5..ed9284d2c5 100644..100755
--- a/indra/llcommon/llstrider.h
+++ b/indra/llcommon/llstrider.h
diff --git a/indra/llcommon/llstring.cpp b/indra/llcommon/llstring.cpp
index 0c32679744..0c32679744 100644..100755
--- a/indra/llcommon/llstring.cpp
+++ b/indra/llcommon/llstring.cpp
diff --git a/indra/llcommon/llstring.h b/indra/llcommon/llstring.h
index 119efc7957..119efc7957 100644..100755
--- a/indra/llcommon/llstring.h
+++ b/indra/llcommon/llstring.h
diff --git a/indra/llcommon/llstringtable.cpp b/indra/llcommon/llstringtable.cpp
index 7ad3805351..7ad3805351 100644..100755
--- a/indra/llcommon/llstringtable.cpp
+++ b/indra/llcommon/llstringtable.cpp
diff --git a/indra/llcommon/llstringtable.h b/indra/llcommon/llstringtable.h
index 59d7372ed4..59d7372ed4 100644..100755
--- a/indra/llcommon/llstringtable.h
+++ b/indra/llcommon/llstringtable.h
diff --git a/indra/llcommon/llsys.cpp b/indra/llcommon/llsys.cpp
index 0a68fe2e3b..0730b2ed8b 100644..100755
--- a/indra/llcommon/llsys.cpp
+++ b/indra/llcommon/llsys.cpp
@@ -86,6 +86,7 @@ using namespace llsd;
 #	include <sys/sysinfo.h>
 #   include <stdexcept>
 const char MEMINFO_FILE[] = "/proc/meminfo";
+#   include <gnu/libc-version.h>
 #elif LL_SOLARIS
 #	include <stdio.h>
 #	include <unistd.h>
@@ -181,8 +182,41 @@ bool get_shell32_dll_version(DWORD& major, DWORD& minor, DWORD& build_number)
 }
 #endif // LL_WINDOWS
 
+// Wrap boost::regex_match() with a function that doesn't throw.
+template <typename S, typename M, typename R>
+static bool regex_match_no_exc(const S& string, M& match, const R& regex)
+{
+    try
+    {
+        return boost::regex_match(string, match, regex);
+    }
+    catch (const std::runtime_error& e)
+    {
+        LL_WARNS("LLMemoryInfo") << "error matching with '" << regex.str() << "': "
+                                 << e.what() << ":\n'" << string << "'" << LL_ENDL;
+        return false;
+    }
+}
+
+// Wrap boost::regex_search() with a function that doesn't throw.
+template <typename S, typename M, typename R>
+static bool regex_search_no_exc(const S& string, M& match, const R& regex)
+{
+    try
+    {
+        return boost::regex_search(string, match, regex);
+    }
+    catch (const std::runtime_error& e)
+    {
+        LL_WARNS("LLMemoryInfo") << "error searching with '" << regex.str() << "': "
+                                 << e.what() << ":\n'" << string << "'" << LL_ENDL;
+        return false;
+    }
+}
+
+
 LLOSInfo::LLOSInfo() :
-	mMajorVer(0), mMinorVer(0), mBuild(0)
+	mMajorVer(0), mMinorVer(0), mBuild(0), mOSVersionString("")	 
 {
 
 #if LL_WINDOWS
@@ -418,6 +452,102 @@ LLOSInfo::LLOSInfo() :
 		mOSString = mOSStringSimple;
 	}
 	
+#elif LL_LINUX
+	
+	struct utsname un;
+	if(uname(&un) != -1)
+	{
+		mOSStringSimple.append(un.sysname);
+		mOSStringSimple.append(" ");
+		mOSStringSimple.append(un.release);
+
+		mOSString = mOSStringSimple;
+		mOSString.append(" ");
+		mOSString.append(un.version);
+		mOSString.append(" ");
+		mOSString.append(un.machine);
+
+		// Simplify 'Simple'
+		std::string ostype = mOSStringSimple.substr(0, mOSStringSimple.find_first_of(" ", 0));
+		if (ostype == "Linux")
+		{
+			// Only care about major and minor Linux versions, truncate at second '.'
+			std::string::size_type idx1 = mOSStringSimple.find_first_of(".", 0);
+			std::string::size_type idx2 = (idx1 != std::string::npos) ? mOSStringSimple.find_first_of(".", idx1+1) : std::string::npos;
+			std::string simple = mOSStringSimple.substr(0, idx2);
+			if (simple.length() > 0)
+				mOSStringSimple = simple;
+		}
+	}
+	else
+	{
+		mOSStringSimple.append("Unable to collect OS info");
+		mOSString = mOSStringSimple;
+	}
+
+	const char OS_VERSION_MATCH_EXPRESSION[] = "([0-9]+)\\.([0-9]+)(\\.([0-9]+))?";
+	boost::regex os_version_parse(OS_VERSION_MATCH_EXPRESSION);
+	boost::smatch matched;
+
+	std::string glibc_version(gnu_get_libc_version());
+	if ( regex_match_no_exc(glibc_version, matched, os_version_parse) )
+	{
+		LL_INFOS("AppInit") << "Using glibc version '" << glibc_version << "' as OS version" << LL_ENDL;
+	
+		std::string version_value;
+
+		if ( matched[1].matched ) // Major version
+		{
+			version_value.assign(matched[1].first, matched[1].second);
+			if (sscanf(version_value.c_str(), "%d", &mMajorVer) != 1)
+			{
+			  LL_WARNS("AppInit") << "failed to parse major version '" << version_value << "' as a number" << LL_ENDL;
+			}
+		}
+		else
+		{
+			LL_ERRS("AppInit")
+				<< "OS version regex '" << OS_VERSION_MATCH_EXPRESSION 
+				<< "' returned true, but major version [1] did not match"
+				<< LL_ENDL;
+		}
+
+		if ( matched[2].matched ) // Minor version
+		{
+			version_value.assign(matched[2].first, matched[2].second);
+			if (sscanf(version_value.c_str(), "%d", &mMinorVer) != 1)
+			{
+			  LL_ERRS("AppInit") << "failed to parse minor version '" << version_value << "' as a number" << LL_ENDL;
+			}
+		}
+		else
+		{
+			LL_ERRS("AppInit")
+				<< "OS version regex '" << OS_VERSION_MATCH_EXPRESSION 
+				<< "' returned true, but minor version [1] did not match"
+				<< LL_ENDL;
+		}
+
+		if ( matched[4].matched ) // Build version (optional) - note that [3] includes the '.'
+		{
+			version_value.assign(matched[4].first, matched[4].second);
+			if (sscanf(version_value.c_str(), "%d", &mBuild) != 1)
+			{
+			  LL_ERRS("AppInit") << "failed to parse build version '" << version_value << "' as a number" << LL_ENDL;
+			}
+		}
+		else
+		{
+			LL_INFOS("AppInit")
+				<< "OS build version not provided; using zero"
+				<< LL_ENDL;
+		}
+	}
+	else
+	{
+		LL_WARNS("AppInit") << "glibc version '" << glibc_version << "' cannot be parsed to three numbers; using all zeros" << LL_ENDL;
+	}
+
 #else
 	
 	struct utsname un;
@@ -450,8 +580,13 @@ LLOSInfo::LLOSInfo() :
 		mOSStringSimple.append("Unable to collect OS info");
 		mOSString = mOSStringSimple;
 	}
+
 #endif
 
+	std::stringstream dotted_version_string;
+	dotted_version_string << mMajorVer << "." << mMinorVer << "." << mBuild;
+	mOSVersionString.append(dotted_version_string.str());
+
 }
 
 #ifndef LL_WINDOWS
@@ -502,6 +637,11 @@ const std::string& LLOSInfo::getOSStringSimple() const
 	return mOSStringSimple;
 }
 
+const std::string& LLOSInfo::getOSVersionString() const
+{
+	return mOSVersionString;
+}
+
 const S32 STATUS_SIZE = 8192;
 
 //static
@@ -693,38 +833,6 @@ private:
 	LLSD mStats;
 };
 
-// Wrap boost::regex_match() with a function that doesn't throw.
-template <typename S, typename M, typename R>
-static bool regex_match_no_exc(const S& string, M& match, const R& regex)
-{
-    try
-    {
-        return boost::regex_match(string, match, regex);
-    }
-    catch (const std::runtime_error& e)
-    {
-        LL_WARNS("LLMemoryInfo") << "error matching with '" << regex.str() << "': "
-                                 << e.what() << ":\n'" << string << "'" << LL_ENDL;
-        return false;
-    }
-}
-
-// Wrap boost::regex_search() with a function that doesn't throw.
-template <typename S, typename M, typename R>
-static bool regex_search_no_exc(const S& string, M& match, const R& regex)
-{
-    try
-    {
-        return boost::regex_search(string, match, regex);
-    }
-    catch (const std::runtime_error& e)
-    {
-        LL_WARNS("LLMemoryInfo") << "error searching with '" << regex.str() << "': "
-                                 << e.what() << ":\n'" << string << "'" << LL_ENDL;
-        return false;
-    }
-}
-
 LLMemoryInfo::LLMemoryInfo()
 {
 	refresh();
diff --git a/indra/llcommon/llsys.h b/indra/llcommon/llsys.h
index 739e795d3a..cfed0fff17 100644..100755
--- a/indra/llcommon/llsys.h
+++ b/indra/llcommon/llsys.h
@@ -49,6 +49,8 @@ public:
 	const std::string& getOSString() const;
 	const std::string& getOSStringSimple() const;
 
+	const std::string& getOSVersionString() const;
+	
 	S32 mMajorVer;
 	S32 mMinorVer;
 	S32 mBuild;
@@ -62,6 +64,7 @@ public:
 private:
 	std::string mOSString;
 	std::string mOSStringSimple;
+	std::string mOSVersionString;
 };
 
 
diff --git a/indra/llcommon/llthread.cpp b/indra/llcommon/llthread.cpp
index 1d56a52c32..1d56a52c32 100644..100755
--- a/indra/llcommon/llthread.cpp
+++ b/indra/llcommon/llthread.cpp
diff --git a/indra/llcommon/llthread.h b/indra/llcommon/llthread.h
index 5c8bbca2ca..0fb89c5613 100644..100755
--- a/indra/llcommon/llthread.h
+++ b/indra/llcommon/llthread.h
@@ -30,6 +30,7 @@
 #include "llapp.h"
 #include "llapr.h"
 #include "apr_thread_cond.h"
+#include "boost/intrusive_ptr.hpp"
 
 class LLThread;
 class LLMutex;
@@ -284,6 +285,22 @@ private:
 	S32	mRef; 
 };
 
+/**
+ * intrusive pointer support for LLThreadSafeRefCount
+ * this allows you to use boost::intrusive_ptr with any LLThreadSafeRefCount-derived type
+ */
+namespace boost
+{
+	inline void intrusive_ptr_add_ref(LLThreadSafeRefCount* p) 
+	{
+		p->ref();
+	}
+
+	inline void intrusive_ptr_release(LLThreadSafeRefCount* p) 
+	{
+		p->unref(); 
+	}
+};
 //============================================================================
 
 // Simple responder for self destructing callbacks
diff --git a/indra/llcommon/llthreadsafequeue.cpp b/indra/llcommon/llthreadsafequeue.cpp
index 8a73e632a9..8a73e632a9 100644..100755
--- a/indra/llcommon/llthreadsafequeue.cpp
+++ b/indra/llcommon/llthreadsafequeue.cpp
diff --git a/indra/llcommon/llthreadsafequeue.h b/indra/llcommon/llthreadsafequeue.h
index 58cac38769..58cac38769 100644..100755
--- a/indra/llcommon/llthreadsafequeue.h
+++ b/indra/llcommon/llthreadsafequeue.h
diff --git a/indra/llcommon/lltimer.cpp b/indra/llcommon/lltimer.cpp
index 9ebc6de7f4..9ebc6de7f4 100644..100755
--- a/indra/llcommon/lltimer.cpp
+++ b/indra/llcommon/lltimer.cpp
diff --git a/indra/llcommon/lltimer.h b/indra/llcommon/lltimer.h
index 513de0605d..513de0605d 100644..100755
--- a/indra/llcommon/lltimer.h
+++ b/indra/llcommon/lltimer.h
diff --git a/indra/llcommon/lltreeiterators.h b/indra/llcommon/lltreeiterators.h
index ba861ae70b..ba861ae70b 100644..100755
--- a/indra/llcommon/lltreeiterators.h
+++ b/indra/llcommon/lltreeiterators.h
diff --git a/indra/llcommon/lltypeinfolookup.h b/indra/llcommon/lltypeinfolookup.h
index 0b6862444e..0b6862444e 100644..100755
--- a/indra/llcommon/lltypeinfolookup.h
+++ b/indra/llcommon/lltypeinfolookup.h
diff --git a/indra/llcommon/lluri.cpp b/indra/llcommon/lluri.cpp
index 21456a599b..21456a599b 100644..100755
--- a/indra/llcommon/lluri.cpp
+++ b/indra/llcommon/lluri.cpp
diff --git a/indra/llcommon/lluri.h b/indra/llcommon/lluri.h
index c82a666e48..c82a666e48 100644..100755
--- a/indra/llcommon/lluri.h
+++ b/indra/llcommon/lluri.h
diff --git a/indra/llcommon/lluuid.cpp b/indra/llcommon/lluuid.cpp
index 0aaa50d231..0aaa50d231 100644..100755
--- a/indra/llcommon/lluuid.cpp
+++ b/indra/llcommon/lluuid.cpp
diff --git a/indra/llcommon/lluuid.h b/indra/llcommon/lluuid.h
index 7889828c85..7889828c85 100644..100755
--- a/indra/llcommon/lluuid.h
+++ b/indra/llcommon/lluuid.h
diff --git a/indra/llcommon/lluuidhashmap.h b/indra/llcommon/lluuidhashmap.h
index e294670030..e294670030 100644..100755
--- a/indra/llcommon/lluuidhashmap.h
+++ b/indra/llcommon/lluuidhashmap.h
diff --git a/indra/llcommon/llversionserver.h b/indra/llcommon/llversionserver.h
index b19ba3bf74..ef68a0eaf5 100644..100755
--- a/indra/llcommon/llversionserver.h
+++ b/indra/llcommon/llversionserver.h
@@ -30,7 +30,7 @@
 const S32 LL_VERSION_MAJOR = 2;
 const S32 LL_VERSION_MINOR = 1;
 const S32 LL_VERSION_PATCH = 0;
-const S32 LL_VERSION_BUILD = 13828;
+const S32 LL_VERSION_BUILD = 264760;
 
 const char * const LL_CHANNEL = "Second Life Server";
 
diff --git a/indra/llcommon/llworkerthread.cpp b/indra/llcommon/llworkerthread.cpp
index 3d05a30ac2..3d05a30ac2 100644..100755
--- a/indra/llcommon/llworkerthread.cpp
+++ b/indra/llcommon/llworkerthread.cpp
diff --git a/indra/llcommon/llworkerthread.h b/indra/llcommon/llworkerthread.h
index be46394d6e..be46394d6e 100644..100755
--- a/indra/llcommon/llworkerthread.h
+++ b/indra/llcommon/llworkerthread.h
diff --git a/indra/llcommon/metaclass.cpp b/indra/llcommon/metaclass.cpp
index 5e403511cf..5e403511cf 100644..100755
--- a/indra/llcommon/metaclass.cpp
+++ b/indra/llcommon/metaclass.cpp
diff --git a/indra/llcommon/metaclass.h b/indra/llcommon/metaclass.h
index 626757d58d..626757d58d 100644..100755
--- a/indra/llcommon/metaclass.h
+++ b/indra/llcommon/metaclass.h
diff --git a/indra/llcommon/metaclasst.h b/indra/llcommon/metaclasst.h
index b9a7ae219d..b9a7ae219d 100644..100755
--- a/indra/llcommon/metaclasst.h
+++ b/indra/llcommon/metaclasst.h
diff --git a/indra/llcommon/metaproperty.cpp b/indra/llcommon/metaproperty.cpp
index 98d850bf1e..98d850bf1e 100644..100755
--- a/indra/llcommon/metaproperty.cpp
+++ b/indra/llcommon/metaproperty.cpp
diff --git a/indra/llcommon/metaproperty.h b/indra/llcommon/metaproperty.h
index bd5bb1a30f..bd5bb1a30f 100644..100755
--- a/indra/llcommon/metaproperty.h
+++ b/indra/llcommon/metaproperty.h
diff --git a/indra/llcommon/metapropertyt.h b/indra/llcommon/metapropertyt.h
index 7a36c161da..7a36c161da 100644..100755
--- a/indra/llcommon/metapropertyt.h
+++ b/indra/llcommon/metapropertyt.h
diff --git a/indra/llcommon/reflective.cpp b/indra/llcommon/reflective.cpp
index 2cc0e7e1f2..2cc0e7e1f2 100644..100755
--- a/indra/llcommon/reflective.cpp
+++ b/indra/llcommon/reflective.cpp
diff --git a/indra/llcommon/reflective.h b/indra/llcommon/reflective.h
index da5c5a2630..da5c5a2630 100644..100755
--- a/indra/llcommon/reflective.h
+++ b/indra/llcommon/reflective.h
diff --git a/indra/llcommon/reflectivet.h b/indra/llcommon/reflectivet.h
index 958921f23e..958921f23e 100644..100755
--- a/indra/llcommon/reflectivet.h
+++ b/indra/llcommon/reflectivet.h
diff --git a/indra/llcommon/roles_constants.h b/indra/llcommon/roles_constants.h
index effd15ea72..effd15ea72 100644..100755
--- a/indra/llcommon/roles_constants.h
+++ b/indra/llcommon/roles_constants.h
diff --git a/indra/llcommon/stdenums.h b/indra/llcommon/stdenums.h
index 40b3364b36..efcbe76795 100644..100755
--- a/indra/llcommon/stdenums.h
+++ b/indra/llcommon/stdenums.h
@@ -51,7 +51,8 @@ enum EDragAndDropType
 	DAD_LINK			= 14,
 	DAD_MESH            = 15,
 	DAD_WIDGET          = 16,
-	DAD_COUNT           = 17,   // number of types in this enum
+	DAD_PERSON          = 17,
+	DAD_COUNT           = 18,   // number of types in this enum
 };
 
 // Reasons for drags to be denied.
diff --git a/indra/llcommon/stdtypes.h b/indra/llcommon/stdtypes.h
index bf3f3f9ee8..bf3f3f9ee8 100644..100755
--- a/indra/llcommon/stdtypes.h
+++ b/indra/llcommon/stdtypes.h
diff --git a/indra/llcommon/string_table.h b/indra/llcommon/string_table.h
index fe6416fb50..fe6416fb50 100644..100755
--- a/indra/llcommon/string_table.h
+++ b/indra/llcommon/string_table.h
diff --git a/indra/llcommon/stringize.h b/indra/llcommon/stringize.h
index 72f2e58ce1..72f2e58ce1 100644..100755
--- a/indra/llcommon/stringize.h
+++ b/indra/llcommon/stringize.h
diff --git a/indra/llcommon/tests/StringVec.h b/indra/llcommon/tests/StringVec.h
index a380b00a05..a380b00a05 100644..100755
--- a/indra/llcommon/tests/StringVec.h
+++ b/indra/llcommon/tests/StringVec.h
diff --git a/indra/llcommon/tests/bitpack_test.cpp b/indra/llcommon/tests/bitpack_test.cpp
index 4c3bc674af..afc0c18cd0 100644..100755
--- a/indra/llcommon/tests/bitpack_test.cpp
+++ b/indra/llcommon/tests/bitpack_test.cpp
@@ -71,7 +71,6 @@ namespace tut
 		U8 packbuffer[255];
 		U8 unpackbuffer[255];
 		int pack_bufsize = 0;
-		int unpack_bufsize = 0;
 
 		LLBitPack bitpack(packbuffer, 255);
 
@@ -81,21 +80,20 @@ namespace tut
 		pack_bufsize = bitpack.flushBitPack();
 
 		LLBitPack bitunpack(packbuffer, pack_bufsize*8);
-		unpack_bufsize = bitunpack.bitUnpack(&unpackbuffer[0], 8);
+		bitunpack.bitUnpack(&unpackbuffer[0], 8);
 		ensure("bitPack: individual unpack: 0", unpackbuffer[0] == (U8) str[0]);
-		unpack_bufsize = bitunpack.bitUnpack(&unpackbuffer[0], 8);
+		bitunpack.bitUnpack(&unpackbuffer[0], 8);
 		ensure("bitPack: individual unpack: 1", unpackbuffer[0] == (U8) str[1]);
-		unpack_bufsize = bitunpack.bitUnpack(&unpackbuffer[0], 8);
+		bitunpack.bitUnpack(&unpackbuffer[0], 8);
 		ensure("bitPack: individual unpack: 2", unpackbuffer[0] == (U8) str[2]);
-		unpack_bufsize = bitunpack.bitUnpack(&unpackbuffer[0], 8);
+		bitunpack.bitUnpack(&unpackbuffer[0], 8);
 		ensure("bitPack: individual unpack: 3", unpackbuffer[0] == (U8) str[3]);
-		unpack_bufsize = bitunpack.bitUnpack(&unpackbuffer[0], 8);
+		bitunpack.bitUnpack(&unpackbuffer[0], 8);
 		ensure("bitPack: individual unpack: 4", unpackbuffer[0] == (U8) str[4]);
-		unpack_bufsize = bitunpack.bitUnpack(&unpackbuffer[0], 8);
+		bitunpack.bitUnpack(&unpackbuffer[0], 8);
 		ensure("bitPack: individual unpack: 5", unpackbuffer[0] == (U8) str[5]);
-		unpack_bufsize = bitunpack.bitUnpack(unpackbuffer, 8*4); // Life
+		bitunpack.bitUnpack(unpackbuffer, 8*4); // Life
 		ensure_memory_matches("bitPack: 4 bytes unpack:", unpackbuffer, 4, str+6, 4);
-		ensure("keep compiler quiet", unpack_bufsize == unpack_bufsize);
 	}
 
 	// U32 packing
diff --git a/indra/llcommon/tests/commonmisc_test.cpp b/indra/llcommon/tests/commonmisc_test.cpp
index b115c153c1..b115c153c1 100644..100755
--- a/indra/llcommon/tests/commonmisc_test.cpp
+++ b/indra/llcommon/tests/commonmisc_test.cpp
diff --git a/indra/llcommon/tests/listener.h b/indra/llcommon/tests/listener.h
index 9c5c18a150..9c5c18a150 100644..100755
--- a/indra/llcommon/tests/listener.h
+++ b/indra/llcommon/tests/listener.h
diff --git a/indra/llcommon/tests/llallocator_heap_profile_test.cpp b/indra/llcommon/tests/llallocator_heap_profile_test.cpp
index 44a9705803..44a9705803 100644..100755
--- a/indra/llcommon/tests/llallocator_heap_profile_test.cpp
+++ b/indra/llcommon/tests/llallocator_heap_profile_test.cpp
diff --git a/indra/llcommon/tests/llallocator_test.cpp b/indra/llcommon/tests/llallocator_test.cpp
index 4e62eaee67..4e62eaee67 100644..100755
--- a/indra/llcommon/tests/llallocator_test.cpp
+++ b/indra/llcommon/tests/llallocator_test.cpp
diff --git a/indra/llcommon/tests/llbase64_test.cpp b/indra/llcommon/tests/llbase64_test.cpp
index d0394150fa..d0394150fa 100644..100755
--- a/indra/llcommon/tests/llbase64_test.cpp
+++ b/indra/llcommon/tests/llbase64_test.cpp
diff --git a/indra/llcommon/tests/lldate_test.cpp b/indra/llcommon/tests/lldate_test.cpp
index 7c95ccb91f..7c95ccb91f 100644..100755
--- a/indra/llcommon/tests/lldate_test.cpp
+++ b/indra/llcommon/tests/lldate_test.cpp
diff --git a/indra/llcommon/tests/lldependencies_test.cpp b/indra/llcommon/tests/lldependencies_test.cpp
index 5395d785b6..5395d785b6 100644..100755
--- a/indra/llcommon/tests/lldependencies_test.cpp
+++ b/indra/llcommon/tests/lldependencies_test.cpp
diff --git a/indra/llcommon/tests/llerror_test.cpp b/indra/llcommon/tests/llerror_test.cpp
index 279a90e51b..279a90e51b 100644..100755
--- a/indra/llcommon/tests/llerror_test.cpp
+++ b/indra/llcommon/tests/llerror_test.cpp
diff --git a/indra/llcommon/tests/lleventcoro_test.cpp b/indra/llcommon/tests/lleventcoro_test.cpp
index 8d12529613..8d12529613 100644..100755
--- a/indra/llcommon/tests/lleventcoro_test.cpp
+++ b/indra/llcommon/tests/lleventcoro_test.cpp
diff --git a/indra/llcommon/tests/lleventdispatcher_test.cpp b/indra/llcommon/tests/lleventdispatcher_test.cpp
index 263c9b171f..263c9b171f 100644..100755
--- a/indra/llcommon/tests/lleventdispatcher_test.cpp
+++ b/indra/llcommon/tests/lleventdispatcher_test.cpp
diff --git a/indra/llcommon/tests/lleventfilter_test.cpp b/indra/llcommon/tests/lleventfilter_test.cpp
index ca05ef62a9..ca05ef62a9 100644..100755
--- a/indra/llcommon/tests/lleventfilter_test.cpp
+++ b/indra/llcommon/tests/lleventfilter_test.cpp
diff --git a/indra/llcommon/tests/llframetimer_test.cpp b/indra/llcommon/tests/llframetimer_test.cpp
index 8ac1c91a3a..8ac1c91a3a 100644..100755
--- a/indra/llcommon/tests/llframetimer_test.cpp
+++ b/indra/llcommon/tests/llframetimer_test.cpp
diff --git a/indra/llcommon/tests/llinstancetracker_test.cpp b/indra/llcommon/tests/llinstancetracker_test.cpp
index 454695ff9f..e769c3e22c 100644..100755
--- a/indra/llcommon/tests/llinstancetracker_test.cpp
+++ b/indra/llcommon/tests/llinstancetracker_test.cpp
@@ -267,7 +267,6 @@ namespace tut
         {
             existing.insert(&*uki);
         }
-        Unkeyed* puk = NULL;
         try
         {
             // We don't expect the assignment to take place because we expect
@@ -280,7 +279,7 @@ namespace tut
             // realize we're testing the C++ implementation more than
             // Unkeyed's implementation, but this seems an important point to
             // nail down.
-            puk = new Unkeyed("throw");
+            new Unkeyed("throw");
         }
         catch (const Badness&)
         {
diff --git a/indra/llcommon/tests/lllazy_test.cpp b/indra/llcommon/tests/lllazy_test.cpp
index 32a717f4fc..32a717f4fc 100644..100755
--- a/indra/llcommon/tests/lllazy_test.cpp
+++ b/indra/llcommon/tests/lllazy_test.cpp
diff --git a/indra/llcommon/tests/llleap_test.cpp b/indra/llcommon/tests/llleap_test.cpp
index 9b755e9ca5..29060d4ef5 100644..100755
--- a/indra/llcommon/tests/llleap_test.cpp
+++ b/indra/llcommon/tests/llleap_test.cpp
@@ -122,13 +122,10 @@ namespace tut
                    // finding indra/lib/python. Use our __FILE__, with
                    // raw-string syntax to deal with Windows pathnames.
                    "mydir = os.path.dirname(r'" << __FILE__ << "')\n"
-                   "try:\n"
-                   "    from llbase import llsd\n"
-                   "except ImportError:\n"
                    // We expect mydir to be .../indra/llcommon/tests.
-                   "    sys.path.insert(0,\n"
-                   "        os.path.join(mydir, os.pardir, os.pardir, 'lib', 'python'))\n"
-                   "    from indra.base import llsd\n"
+                   "sys.path.insert(0,\n"
+                   "    os.path.join(mydir, os.pardir, os.pardir, 'lib', 'python'))\n"
+                   "from indra.base import llsd\n"
                    "\n"
                    "class ProtocolError(Exception):\n"
                    "    def __init__(self, msg, data):\n"
diff --git a/indra/llcommon/tests/llmemtype_test.cpp b/indra/llcommon/tests/llmemtype_test.cpp
index 1f050d6dc7..1f050d6dc7 100644..100755
--- a/indra/llcommon/tests/llmemtype_test.cpp
+++ b/indra/llcommon/tests/llmemtype_test.cpp
diff --git a/indra/llcommon/tests/llprocess_test.cpp b/indra/llcommon/tests/llprocess_test.cpp
index 99186ed434..6f1e7d46b8 100644..100755
--- a/indra/llcommon/tests/llprocess_test.cpp
+++ b/indra/llcommon/tests/llprocess_test.cpp
@@ -608,6 +608,9 @@ namespace tut
     void object::test<5>()
     {
         set_test_name("exit(2)");
+#if LL_WINDOWS
+		skip("MAINT-2302: This frequently (though not always) fails on Windows.");
+#endif
         PythonProcessLauncher py(get_test_name(),
                                  "import sys\n"
                                  "sys.exit(2)\n");
@@ -620,6 +623,9 @@ namespace tut
     void object::test<6>()
     {
         set_test_name("syntax_error:");
+#if LL_WINDOWS
+		skip("MAINT-2302: This frequently (though not always) fails on Windows.");
+#endif
         PythonProcessLauncher py(get_test_name(),
                                  "syntax_error:\n");
         py.mParams.files.add(LLProcess::FileParam()); // inherit stdin
@@ -641,6 +647,9 @@ namespace tut
     void object::test<7>()
     {
         set_test_name("explicit kill()");
+#if LL_WINDOWS
+		skip("MAINT-2302: This frequently (though not always) fails on Windows.");
+#endif
         PythonProcessLauncher py(get_test_name(),
                                  "from __future__ import with_statement\n"
                                  "import sys, time\n"
@@ -685,6 +694,9 @@ namespace tut
     void object::test<8>()
     {
         set_test_name("implicit kill()");
+#if LL_WINDOWS
+		skip("MAINT-2302: This frequently (though not always) fails on Windows.");
+#endif
         NamedTempFile out("out", "not started");
         LLProcess::handle phandle(0);
         {
diff --git a/indra/llcommon/tests/llprocessor_test.cpp b/indra/llcommon/tests/llprocessor_test.cpp
index 884e1b5e5b..884e1b5e5b 100644..100755
--- a/indra/llcommon/tests/llprocessor_test.cpp
+++ b/indra/llcommon/tests/llprocessor_test.cpp
diff --git a/indra/llcommon/tests/llrand_test.cpp b/indra/llcommon/tests/llrand_test.cpp
index 383e6f9e0a..383e6f9e0a 100644..100755
--- a/indra/llcommon/tests/llrand_test.cpp
+++ b/indra/llcommon/tests/llrand_test.cpp
diff --git a/indra/llcommon/tests/llsdserialize_test.cpp b/indra/llcommon/tests/llsdserialize_test.cpp
index e625545763..4d436e8897 100644..100755
--- a/indra/llcommon/tests/llsdserialize_test.cpp
+++ b/indra/llcommon/tests/llsdserialize_test.cpp
@@ -1523,10 +1523,7 @@ namespace tut
                         "sys.path.insert(0,\n"
                         "    os.path.join(os.path.dirname(r'" __FILE__ "'),\n"
                         "                 os.pardir, os.pardir, 'lib', 'python'))\n"
-                        "try:\n"
-                        "    from llbase import llsd\n"
-                        "except ImportError:\n"
-                        "    from indra.base import llsd\n")
+                        "from indra.base import llsd\n")
         {}
         ~TestPythonCompatible() {}
 
diff --git a/indra/llcommon/tests/llsingleton_test.cpp b/indra/llcommon/tests/llsingleton_test.cpp
index 385289aefe..385289aefe 100644..100755
--- a/indra/llcommon/tests/llsingleton_test.cpp
+++ b/indra/llcommon/tests/llsingleton_test.cpp
diff --git a/indra/llcommon/tests/llstreamqueue_test.cpp b/indra/llcommon/tests/llstreamqueue_test.cpp
index 050ad5c5bf..050ad5c5bf 100644..100755
--- a/indra/llcommon/tests/llstreamqueue_test.cpp
+++ b/indra/llcommon/tests/llstreamqueue_test.cpp
diff --git a/indra/llcommon/tests/llstring_test.cpp b/indra/llcommon/tests/llstring_test.cpp
index 93d3968dbf..93d3968dbf 100644..100755
--- a/indra/llcommon/tests/llstring_test.cpp
+++ b/indra/llcommon/tests/llstring_test.cpp
diff --git a/indra/llcommon/tests/lltreeiterators_test.cpp b/indra/llcommon/tests/lltreeiterators_test.cpp
index 1d619867d4..1d619867d4 100644..100755
--- a/indra/llcommon/tests/lltreeiterators_test.cpp
+++ b/indra/llcommon/tests/lltreeiterators_test.cpp
diff --git a/indra/llcommon/tests/lluri_test.cpp b/indra/llcommon/tests/lluri_test.cpp
index 4c64f15ca7..4c64f15ca7 100644..100755
--- a/indra/llcommon/tests/lluri_test.cpp
+++ b/indra/llcommon/tests/lluri_test.cpp
diff --git a/indra/llcommon/tests/reflection_test.cpp b/indra/llcommon/tests/reflection_test.cpp
index 8980ebb1f1..8980ebb1f1 100644..100755
--- a/indra/llcommon/tests/reflection_test.cpp
+++ b/indra/llcommon/tests/reflection_test.cpp
diff --git a/indra/llcommon/tests/stringize_test.cpp b/indra/llcommon/tests/stringize_test.cpp
index 3d34f23998..3d34f23998 100644..100755
--- a/indra/llcommon/tests/stringize_test.cpp
+++ b/indra/llcommon/tests/stringize_test.cpp
diff --git a/indra/llcommon/tests/wrapllerrs.h b/indra/llcommon/tests/wrapllerrs.h
index a4d3a4e026..a4d3a4e026 100644..100755
--- a/indra/llcommon/tests/wrapllerrs.h
+++ b/indra/llcommon/tests/wrapllerrs.h
diff --git a/indra/llcommon/timer.h b/indra/llcommon/timer.h
index 82d19c2d32..82d19c2d32 100644..100755
--- a/indra/llcommon/timer.h
+++ b/indra/llcommon/timer.h
diff --git a/indra/llcommon/timing.cpp b/indra/llcommon/timing.cpp
index c2dc695ef3..c2dc695ef3 100644..100755
--- a/indra/llcommon/timing.cpp
+++ b/indra/llcommon/timing.cpp
diff --git a/indra/llcommon/timing.h b/indra/llcommon/timing.h
index c408d4c446..c408d4c446 100644..100755
--- a/indra/llcommon/timing.h
+++ b/indra/llcommon/timing.h
diff --git a/indra/llcommon/u64.cpp b/indra/llcommon/u64.cpp
index eea16c5036..eea16c5036 100644..100755
--- a/indra/llcommon/u64.cpp
+++ b/indra/llcommon/u64.cpp
diff --git a/indra/llcommon/u64.h b/indra/llcommon/u64.h
index 75c8a59136..75c8a59136 100644..100755
--- a/indra/llcommon/u64.h
+++ b/indra/llcommon/u64.h