diff --git a/indra/newview/llavataractions.cpp b/indra/newview/llavataractions.cpp
index 50697d1885a4823931db7ba5932a30933f6cd508..3326103d032ed3ee91c814cf77e45ed6bf834254 100755
--- a/indra/newview/llavataractions.cpp
+++ b/indra/newview/llavataractions.cpp
@@ -697,15 +697,15 @@ namespace action_give_inventory
 }
 
 // static
-void LLAvatarActions::buildResidentsString(const std::vector<LLAvatarName> avatar_names, std::string& residents_string)
+void LLAvatarActions::buildResidentsString(std::vector<LLAvatarName> avatar_names, std::string& residents_string)
 {
 	llassert(avatar_names.size() > 0);
-
+	
+	std::sort(avatar_names.begin(), avatar_names.end());
 	const std::string& separator = LLTrans::getString("words_separator");
 	for (std::vector<LLAvatarName>::const_iterator it = avatar_names.begin(); ; )
 	{
-		LLAvatarName av_name = *it;
-		residents_string.append(av_name.mDisplayName);
+		residents_string.append((*it).mDisplayName);
 		if	(++it == avatar_names.end())
 		{
 			break;
diff --git a/indra/newview/llavataractions.h b/indra/newview/llavataractions.h
index e7cef587c2a166503bfd525c0f45bfd6c49993cb..6e1198cd09885b89f2b3d6c268f74558b410eef4 100644
--- a/indra/newview/llavataractions.h
+++ b/indra/newview/llavataractions.h
@@ -216,7 +216,7 @@ class LLAvatarActions
 	 * @param avatar_names - a vector of given avatar names from which resulting string is built
 	 * @param residents_string - the resulting string
 	 */
-	static void buildResidentsString(const std::vector<LLAvatarName> avatar_names, std::string& residents_string);
+	static void buildResidentsString(std::vector<LLAvatarName> avatar_names, std::string& residents_string);
 
 	/**
 	 * Builds a string of residents' display names separated by "words_separator" string.
diff --git a/indra/newview/llconversationmodel.cpp b/indra/newview/llconversationmodel.cpp
index 15824704fdddef849a95e4ae203b2ba54a0d7112..29e7ac4e12070b48809dfc148f6285a853d955ed 100644
--- a/indra/newview/llconversationmodel.cpp
+++ b/indra/newview/llconversationmodel.cpp
@@ -159,7 +159,6 @@ void LLConversationItemSession::updateParticipantName(LLConversationItemParticip
 		return;
 	}
 	// Build a string containing the participants names and check if ready for display (we don't want "(waiting)" in there)
-	// *TODO: Further factor out common code with LLIMFloater::onParticipantsListChanged()
 	bool all_names_resolved = true;
 	uuid_vec_t temp_uuids; // uuids vector for building the added participants' names string
 	child_list_t::iterator iter = mChildren.begin();
@@ -170,6 +169,9 @@ void LLConversationItemSession::updateParticipantName(LLConversationItemParticip
 		LLAvatarName av_name;
         if (!LLAvatarNameCache::get(current_participant->getUUID(), &av_name))
         {
+			// If the name is not in the cache yet, bail out
+			// Note: we don't bind ourselves to the LLAvatarNameCache event as we are called by
+			// onAvatarNameCache() which is itself attached to the same event.
 			all_names_resolved = false;
 			break;
 		}