a good start for solving this problem will be to watch the logs of myth tv or dcerouter. watch the logs when the problem occurs and maybe we will find a solution.
This is from the DCERouter log.
/01/07 22:17:09.977 Parameter 159(PK_Screen): 128 <0xa7389ba0>
08 04/01/07 22:17:09.979 Parameter 5(Value To Assign): MythTV Player(LinuxMCE LiveTV) <0xaab90ba0>
08 04/01/07 22:17:09.979 Parameter 9(Text): <0xaab90ba0>
08 04/01/07 22:17:09.979 Parameter 29(PK_MediaType): 1 <0xaab90ba0>
08 04/01/07 22:17:09.979 Parameter 41(StreamID): 2 <0xaab90ba0>
08 04/01/07 22:17:09.979 Parameter 48(Value): 0 <0xaab90ba0>
08 04/01/07 22:17:09.979 Parameter 50(Name): mythfrontend.Mythfrontend <0xaab90ba0>
08 04/01/07 22:17:09.979 Parameter 103(List PK Device): 24,24,15,,1,1,0 <0xaab90ba0>
08 04/01/07 22:17:09.979 Parameter 120(Retransmit): 0 <0xaab90ba0>
08 04/01/07 22:17:10.005 Received Message from 19 (OnScreen Orbiter / Family Room) to 28 (Photo Screen Saver / Family Room), type 1 id 193 Command:Off, parameters: <0x79b2eba0>
08 04/01/07 22:17:10.005 Parameter 97(PK_Pipe): 0 <0x79b2eba0>
05 04/01/07 22:17:11.186 Socket::ReceiveData 0x85ec888 failed, bytes left 0 start: 1060000 1: 0 1b: 0 2: 0 2b: 0 m_Socket: 140 Incoming_Conn Socket 140 127.0.0.1EVENT 24 T=35 Event #24 <0x7b331ba0>
05 04/01/07 22:17:11.207 Socket::ReceiveString2 ReceiveData failed m_Socket: -1 Incoming_Conn Socket 140 127.0.0.1EVENT 24 T=35 Event #24 <0x7b331ba0>
05 04/01/07 22:17:11.207 TCPIP: Closing connection to 24 (Router Dev #0) 0x85ec888 m_Socket: -1 <0x7b331ba0>
05 04/01/07 22:17:11.207 Router::RemoveAndDeleteSocket 0x85ec888 24 <0x7b331ba0>
05 04/01/07 22:17:11.186 Socket::ReceiveData 0x85fddc8 failed, bytes left 0 start: 1060000 1: 0 1b: 0 2: 0 2b: 0 m_Socket: 141 Incoming_Conn Socket 141 127.0.0.1EVENT 24 T=35 Event #24 <0x7bb32ba0>
05 04/01/07 22:17:11.209 Socket::ReceiveString2 ReceiveData failed m_Socket: -1 Incoming_Conn Socket 141 127.0.0.1EVENT 24 T=35 Event #24 <0x7bb32ba0>
05 04/01/07 22:17:11.209 TCPIP: Closing connection to 24 (Router Dev #0) 0x85fddc8 m_Socket: -1 <0x7bb32ba0>
05 04/01/07 22:17:11.209 Router::RemoveAndDeleteSocket 0x85fddc8 24 <0x7bb32ba0>
05 04/01/07 22:17:25.384 Router::RemoveAndDeleteSocket 0x8619208 24 <0x7b331ba0>