Curious about a crash log
 

NSC: [NSC-SYS] Rusty has left the server.
Critical: HandleStream
Critical: UActorChannel::ReceivedBunch
Critical: (Actor None)
Critical: UChannel::ReceivedSequencedBunch
Critical: Direct
Critical: UChannel::ReceivedRawBunch
Critical: DispatchDataToChannel
Critical: BunchData
Critical: UNetConnection::ReceivedPacket
Critical: UNetConnection::ReceivedRawPacket
Critical: UTcpNetDriver::TickDispatch
Critical: UpdatePreNet
Critical: ULevel::Tick
Critical: (NetMode=1)
Critical: TickLevel
Critical: UGameEngine::Tick
Critical: UpdateWorld
Critical: UServerCommandlet::Main
Exit: Executing UObject::StaticShutdownAfterError
Exit: Exiting.
Uninitialized: Name subsystem shut down
Uninitialized: Log file closed, 09/12/12 18:53:05

any infor would be great thanks!