Store the Teleport Flags in the Circuit. This doesn't seem to be necessary, because everything has worked so far, but it's the right thing to do.

OpenSim/Framework/AgentCircuitData.cs

@@ -321,6 +321,8 @@ namespace OpenSim.Framework
                 Mac = args["mac"].AsString();
             if (args["id0"] != null)
                 Id0 = args["id0"].AsString();
+            if (args["teleport_flags"] != null)
+                teleportFlags = args["teleport_flags"].AsUInteger();
 
             if (args["start_pos"] != null)
                 Vector3.TryParse(args["start_pos"].AsString(), out startpos);