diff --git a/indra/newview/llgroupactions.cpp b/indra/newview/llgroupactions.cpp
index da27ac259..b3cd2fdec 100644
--- a/indra/newview/llgroupactions.cpp
+++ b/indra/newview/llgroupactions.cpp
@@ -90,7 +90,6 @@ public:
 				// CP_TODO: get the value we pass in via the XUI name
 				// of the tab instead of using a literal like this
 				LLFloaterMyFriends::showInstance( 1 );
-
 				return true;
 			}
             return false;
@@ -123,6 +122,80 @@ public:
 };
 LLGroupHandler gGroupHandler;
 
+// This object represents a pending request for specified group member information
+// which is needed to check whether avatar can leave group
+class LLFetchGroupMemberData : public LLGroupMgrObserver
+{
+public:
+	LLFetchGroupMemberData(const LLUUID& group_id) :
+		mGroupId(group_id),
+		mRequestProcessed(false),
+		LLGroupMgrObserver(group_id)
+	{
+		llinfos << "Sending new group member request for group_id: "<< group_id << llendl;
+		LLGroupMgr* mgr = LLGroupMgr::getInstance();
+		// register ourselves as an observer
+		mgr->addObserver(this);
+		// send a request
+		mgr->sendGroupPropertiesRequest(group_id);
+		mgr->sendCapGroupMembersRequest(group_id);
+	}
+
+	~LLFetchGroupMemberData()
+	{
+		if (!mRequestProcessed)
+		{
+			// Request is pending
+			llwarns << "Destroying pending group member request for group_id: "
+				<< mGroupId << llendl;
+		}
+		// Remove ourselves as an observer
+		LLGroupMgr::getInstance()->removeObserver(this);
+	}
+
+	void changed(LLGroupChange gc)
+	{
+		if (gc == GC_MEMBER_DATA && !mRequestProcessed)
+		{
+			LLGroupMgrGroupData* gdatap = LLGroupMgr::getInstance()->getGroupData(mGroupId);
+			if (!gdatap)
+			{
+				llwarns << "LLGroupMgr::getInstance()->getGroupData() was NULL" << llendl;
+			}
+			else if (!gdatap->isMemberDataComplete())
+			{
+				llwarns << "LLGroupMgr::getInstance()->getGroupData()->isMemberDataComplete() was FALSE" << llendl;
+			}
+			else
+			{
+				processGroupData();
+				mRequestProcessed = true;
+			}
+		}
+	}
+
+	LLUUID getGroupId() { return mGroupId; }
+	virtual void processGroupData() = 0;
+protected:
+	LLUUID mGroupId;
+private:
+	bool mRequestProcessed;
+};
+
+class LLFetchLeaveGroupData : public LLFetchGroupMemberData
+{
+public:
+	LLFetchLeaveGroupData(const LLUUID& group_id)
+		: LLFetchGroupMemberData(group_id)
+	{}
+	void processGroupData()
+	{
+		LLGroupActions::processLeaveGroupDataResponse(mGroupId);
+	}
+};
+
+LLFetchLeaveGroupData* gFetchLeaveGroupData = NULL;
+
 // static
 void LLGroupActions::search()
 {
@@ -226,27 +299,55 @@ bool LLGroupActions::onJoinGroup(const LLSD& notification, const LLSD& response)
 void LLGroupActions::leave(const LLUUID& group_id)
 {
 //	if (group_id.isNull())
-//		return;
 // [RLVa:KB] - Checked: 2011-03-28 (RLVa-1.4.1a) | Added: RLVa-1.3.0f
 	if ( (group_id.isNull()) || ((gAgent.getGroupID() == group_id) && (gRlvHandler.hasBehaviour(RLV_BHVR_SETGROUP))) )
-		return;
 // [/RLVa:KB]
+	{
+		return;
+	}
 
-	S32 count = gAgent.mGroups.count();
-	S32 i;
-	for (i = 0; i < count; ++i)
+	LLGroupData group_data;
+	if (gAgent.getGroupData(group_id, group_data))
 	{
-		if(gAgent.mGroups.get(i).mID == group_id)
-			break;
+		LLGroupMgrGroupData* gdatap = LLGroupMgr::getInstance()->getGroupData(group_id);
+		if (!gdatap || !gdatap->isMemberDataComplete())
+		{
+			if (gFetchLeaveGroupData != NULL)
+			{
+				delete gFetchLeaveGroupData;
+				gFetchLeaveGroupData = NULL;
+			}
+			gFetchLeaveGroupData = new LLFetchLeaveGroupData(group_id);
 	}
-	if (i < count)
+		else
+		{
+			processLeaveGroupDataResponse(group_id);
+		}
+	}
+}
+
+//static
+void LLGroupActions::processLeaveGroupDataResponse(const LLUUID group_id)
+{
+	LLGroupMgrGroupData* gdatap = LLGroupMgr::getInstance()->getGroupData(group_id);
+	LLUUID agent_id = gAgent.getID();
+	LLGroupMgrGroupData::member_list_t::iterator mit = gdatap->mMembers.find(agent_id);
+	//get the member data for the group
+	if ( mit != gdatap->mMembers.end() )
 	{
-		LLSD args;
-		args["GROUP"] = gAgent.mGroups.get(i).mName;
-		LLSD payload;
-		payload["group_id"] = group_id;
-		LLNotificationsUtil::add("GroupLeaveConfirmMember", args, payload, onLeaveGroup);
+		LLGroupMemberData* member_data = (*mit).second;
+
+		if ( member_data && member_data->isOwner() && gdatap->mMemberCount == 1)
+		{
+			LLNotificationsUtil::add("OwnerCannotLeaveGroup");
+			return;
+		}
 	}
+	LLSD args;
+	args["GROUP"] = gdatap->mName;
+	LLSD payload;
+	payload["group_id"] = group_id;
+	LLNotificationsUtil::add("GroupLeaveConfirmMember", args, payload, onLeaveGroup);
 }
 
 // static
@@ -287,7 +388,6 @@ void LLGroupActions::inspect(const LLUUID& group_id)
 	openGroupProfile(group_id);
 }
 
-
 // static
 void LLGroupActions::show(const LLUUID& group_id)
 {
diff --git a/indra/newview/llgroupactions.h b/indra/newview/llgroupactions.h
index b59fbbe40..0cce7460b 100644
--- a/indra/newview/llgroupactions.h
+++ b/indra/newview/llgroupactions.h
@@ -124,8 +124,15 @@ public:
 private:
 	static bool onJoinGroup(const LLSD& notification, const LLSD& response);
 	static bool onLeaveGroup(const LLSD& notification, const LLSD& response);
+
+	/**
+	 * This function is called by LLFetchLeaveGroupData upon receiving a response to a group
+	 * members data request.
+	 */
+	static void processLeaveGroupDataResponse(const LLUUID group_id);
 	static LLFloaterGroupInfo* openGroupProfile(const LLUUID& group_id);
+
+	friend class LLFetchLeaveGroupData;
 };
 
 #endif // LL_LLGROUPACTIONS_H
-
diff --git a/indra/newview/skins/default/xui/en-us/notifications.xml b/indra/newview/skins/default/xui/en-us/notifications.xml
index 3fb2d93fe..fa31d4d26 100644
--- a/indra/newview/skins/default/xui/en-us/notifications.xml
+++ b/indra/newview/skins/default/xui/en-us/notifications.xml
@@ -3313,6 +3313,17 @@ Leave Group?
      yestext="OK"/>
   </notification>
 
+  <notification
+   icon="alertmodal.tga"
+   name="OwnerCannotLeaveGroup"
+   type="alertmodal">
+    Unable to leave group. You cannot leave the group because you are the last owner of the group. Please assign another member to the owner role first.
+    <tag>group</tag>
+    <usetemplate
+     name="okbutton"
+     yestext="OK"/>
+  </notification>
+
   <notification
    icon="alert.tga"
    name="ConfirmKick"