There's 1/128 Chance that is causing the teleport disconnects on the SL Server after Arrived the SL Region by Region Crossing/Teleport due to Server's Mishandling the Packet data. (404 and 503 error if I log in to the Problematic Region) Linden will be look the problem that caused by the viewer to Server Connection and LL might rewrite the protocol to be Unique to SL.