HGTP-mesh bug: the mesh download requests were going to the departing sims for a little while. This was also true for local TPs. BUt for local TPs the assets are on the same server, so it doesn't matter. For HGTPs, it matters. This potential fix moves sending the initial data to later, after the client has completed the movement into the region. Fingers crossed that it doesn't mess other things up!

OpenSim/Region/ClientStack/Linden/UDP/LLUDPServer.cs

@@ -1371,9 +1371,6 @@ namespace OpenSim.Region.ClientStack.LindenUDP
                     // circuit code to the existing child agent.  This is not particularly obvious.
                     SendAckImmediate(endPoint, uccp.Header.Sequence);
             
-                    // We only want to send initial data to new clients, not ones which are being converted from child to root.
-                    if (client != null)
-                        client.SceneAgent.SendInitialDataToMe();
                 }
                 else
                 {

OpenSim/Region/Framework/Scenes/ScenePresence.cs

@@ -1348,6 +1348,8 @@ namespace OpenSim.Region.Framework.Scenes
             // Create child agents in neighbouring regions
             if (openChildAgents && !IsChildAgent)
             {
+                SendInitialDataToMe();
+
                 IEntityTransferModule m_agentTransfer = m_scene.RequestModuleInterface<IEntityTransferModule>();
                 if (m_agentTransfer != null)
                     Util.FireAndForget(delegate { m_agentTransfer.EnableChildAgents(this); });
@@ -1355,6 +1357,7 @@ namespace OpenSim.Region.Framework.Scenes
                 IFriendsModule friendsModule = m_scene.RequestModuleInterface<IFriendsModule>();
                 if (friendsModule != null)
                     friendsModule.SendFriendsOnlineIfNeeded(ControllingClient);
+
             }
 
             // XXX: If we force an update here, then multiple attachments do appear correctly on a destination region