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diff --git a/indra/newview/lloutfitobserver.cpp b/indra/newview/lloutfitobserver.cpp
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+++ b/indra/newview/lloutfitobserver.cpp
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+/**
+ * @file lloutfitobserver.cpp
+ * @brief Outfit observer facade.
+ *
+ * $LicenseInfo:firstyear=2010&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2010, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#include "llviewerprecompiledheaders.h"
+
+#include "llappearancemgr.h"
+#include "lloutfitobserver.h"
+#include "llinventorymodel.h"
+#include "llviewerinventory.h"
+
+LLOutfitObserver::LLOutfitObserver() :
+	mCOFLastVersion(LLViewerInventoryCategory::VERSION_UNKNOWN)
+{
+	mItemNameHash.finalize();
+	gInventory.addObserver(this);
+}
+
+LLOutfitObserver::~LLOutfitObserver()
+{
+	if (gInventory.containsObserver(this))
+	{
+		gInventory.removeObserver(this);
+	}
+}
+
+void LLOutfitObserver::changed(U32 mask)
+{
+	if (!gInventory.isInventoryUsable())
+		return;
+
+	checkCOF();
+
+	checkBaseOutfit();
+}
+
+// static
+S32 LLOutfitObserver::getCategoryVersion(const LLUUID& cat_id)
+{
+	LLViewerInventoryCategory* cat = gInventory.getCategory(cat_id);
+	if (!cat)
+		return LLViewerInventoryCategory::VERSION_UNKNOWN;
+
+	return cat->getVersion();
+}
+
+// static
+const std::string& LLOutfitObserver::getCategoryName(const LLUUID& cat_id)
+{
+	LLViewerInventoryCategory* cat = gInventory.getCategory(cat_id);
+	if (!cat)
+		return LLStringUtil::null;
+
+	return cat->getName();
+}
+
+bool LLOutfitObserver::checkCOF()
+{
+	LLUUID cof = LLAppearanceMgr::getInstance()->getCOF();
+	if (cof.isNull())
+		return false;
+
+	bool cof_changed = false;
+	LLMD5 item_name_hash = gInventory.hashDirectDescendentNames(cof);
+	if (item_name_hash != mItemNameHash)
+	{
+		cof_changed = true;
+		mItemNameHash = item_name_hash;
+	}
+
+	S32 cof_version = getCategoryVersion(cof);
+	if (cof_version != mCOFLastVersion)
+	{
+		cof_changed = true;
+		mCOFLastVersion = cof_version;
+	}
+
+	if (!cof_changed)
+		return false;
+	
+	// dirtiness state should be updated before sending signal
+	LLAppearanceMgr::getInstance()->updateIsDirty();
+	mCOFChanged();
+
+	return true;
+}
+
+void LLOutfitObserver::checkBaseOutfit()
+{
+	LLUUID baseoutfit_id =
+			LLAppearanceMgr::getInstance()->getBaseOutfitUUID();
+
+	if (baseoutfit_id == mBaseOutfitId)
+	{
+		if (baseoutfit_id.isNull())
+			return;
+
+		const S32 baseoutfit_ver = getCategoryVersion(baseoutfit_id);
+		const std::string& baseoutfit_name = getCategoryName(baseoutfit_id);
+
+		if (baseoutfit_ver == mBaseOutfitLastVersion
+				// renaming category doesn't change version, so it's need to check it
+				&& baseoutfit_name == mLastBaseOutfitName)
+			return;
+	}
+	else
+	{
+		mBaseOutfitId = baseoutfit_id;
+		mBOFReplaced();
+
+		if (baseoutfit_id.isNull())
+			return;
+	}
+
+	mBaseOutfitLastVersion = getCategoryVersion(mBaseOutfitId);
+	mLastBaseOutfitName = getCategoryName(baseoutfit_id);
+
+	LLAppearanceMgr& app_mgr = LLAppearanceMgr::instance();
+	// dirtiness state should be updated before sending signal
+	app_mgr.updateIsDirty();
+	mBOFChanged();
+
+	if (mLastOutfitDirtiness != app_mgr.isOutfitDirty())
+	{
+		if(!app_mgr.isOutfitDirty())
+		{
+			mCOFSaved();
+		}
+		mLastOutfitDirtiness = app_mgr.isOutfitDirty();
+	}
+}