diff --git a/indra/newview/app_settings/settings.xml b/indra/newview/app_settings/settings.xml
index 826a79b455..215fcf4eab 100755
--- a/indra/newview/app_settings/settings.xml
+++ b/indra/newview/app_settings/settings.xml
@@ -1937,6 +1937,17 @@
     <string>Boolean</string>
     <key>Value</key>
     <integer>0</integer>
+  </map>
+  <key>DebugAvatarExperimentalServerAppearanceUpdate</key>
+  <map>
+    <key>Comment</key>
+    <string>Experiment with sending full cof_contents instead of cof_version</string>
+    <key>Persist</key>
+    <integer>1</integer>
+    <key>Type</key>
+    <string>Boolean</string>
+    <key>Value</key>
+    <integer>0</integer>
   </map>
 	<key>DebugAvatarRezTime</key>
 	<map>
diff --git a/indra/newview/llappearancemgr.cpp b/indra/newview/llappearancemgr.cpp
index d8ba4239b7..cc78d5a2fc 100755
--- a/indra/newview/llappearancemgr.cpp
+++ b/indra/newview/llappearancemgr.cpp
@@ -3177,10 +3177,41 @@ LLSD LLAppearanceMgr::dumpCOF() const
 		const LLViewerInventoryItem* inv_item = item_array.get(i).get();
 		LLSD item;
 		item["item_id"] = inv_item->getUUID();
-		item["linked_item_id"] = inv_item->getLinkedUUID();
 		item["name"] = inv_item->getName();
 		item["description"] = inv_item->getActualDescription();
-		item["type"] = inv_item->getActualType();
+		item["asset_type"] = inv_item->getActualType();
+		item["inv_type"] = inv_item->getInventoryType();
+		item["linked_id"] = inv_item->getLinkedUUID();
+
+		if (LLAssetType::AT_LINK == inv_item->getActualType())
+		{
+			const LLViewerInventoryItem* linked_item = inv_item->getLinkedItem();
+			if (NULL == linked_item)
+			{
+				llwarns << "Broken link for item '" << inv_item->getName()
+						<< "' (" << inv_item->getUUID()
+						<< ") during requestServerAppearanceUpdate" << llendl;
+				continue;
+			}
+			if (linked_item->getAssetUUID().isNull())
+			{
+				llwarns << "Broken link (null asset) for item '" << inv_item->getName()
+						<< "' (" << inv_item->getUUID()
+						<< ") during requestServerAppearanceUpdate" << llendl;
+				continue;
+			}
+			item["linked_asset_id"] = linked_item->getAssetUUID();
+			item["linked_asset_type"] = linked_item->getType();
+			item["linked_flags"] = LLSD::Integer(linked_item->getFlags());
+		}
+		else if (LLAssetType::AT_LINK_FOLDER != inv_item->getActualType())
+		{
+			llwarns << "Non-link item '" << inv_item->getName()
+					<< "' (" << inv_item->getUUID()
+					<< ") type " << (S32) inv_item->getActualType()
+					<< " during requestServerAppearanceUpdate" << llendl;
+			continue;
+		}
 		result.append(item);
 	}
 	return result;
@@ -3212,14 +3243,17 @@ void LLAppearanceMgr::requestServerAppearanceUpdate(LLCurl::ResponderPtr respond
 	
 	LLSD body;
 	S32 cof_version = getCOFVersion();
-	body["cof_version"] = cof_version;
-	if (gSavedSettings.getBOOL("DebugForceAppearanceRequestFailure"))
+	if (gSavedSettings.getBOOL("DebugAvatarExperimentalServerAppearanceUpdate"))
 	{
-		body["cof_version"] = cof_version+999;
+		body["cof_contents"] = dumpCOF();
 	}
-	if (gSavedSettings.getBOOL("DebugAvatarAppearanceMessage"))
+	else
 	{
-		body["debug_cof"] = dumpCOF(); 	
+		body["cof_version"] = cof_version;
+		if (gSavedSettings.getBOOL("DebugForceAppearanceRequestFailure"))
+		{
+			body["cof_version"] = cof_version+999;
+		}
 	}
 	LL_DEBUGS("Avatar") << "request url " << url << " my_cof_version " << cof_version << llendl;