myth malformed ANN query

slave backend :

2014-06-19 20:52:29.636466 I  MythSocket(22bfd20:17): Connected to (192.168.1.120:6543)
2014-06-19 20:52:29.636649 I  MythSocket(22bfd20:17): write -> 17 27      MYTH_PROTO_VERSION 82 IdIdO
2014-06-19 20:52:29.637760 I  MythSocket(22bfd20:17): read  <- 17 13      ACCEPT[]:[]82
2014-06-19 20:52:29.637814 I  Using protocol version 82
2014-06-19 20:52:29.637911 I  MythSocket(22bfd20:17): write -> 17 30      ANN[]:[]Monitor[]:[]home[]:[]0
2014-06-19 20:52:29.638476 I  MythSocket(22bfd20:17): read  <- 17 29      ERROR[]:[]malformed_ann_query
2014-06-19 20:52:29.638532 I  (0x22bfd30)::DecrRef() -> 0
2014-06-19 20:52:29.638550 I  MythSocket(22bfd20:17): MythSocket dtor : cb 0x0
2014-06-19 20:52:29.639061 E  MythBackend: Failed to open event socket, error was malformed_ann_query
2014-06-19 20:52:29.639194 N  Starting up SSDP Thread...
2014-06-19 20:52:29.640236 I  SSDP Thread Starting soon
2014-06-19 20:52:29.640428 I  SSDP::Run - SSDP Thread Started.
2014-06-19 20:52:29.640514 I  Starting TaskQueue Thread...
2014-06-19 20:52:29.640599 I  TaskQueue Thread Started.
2014-06-19 20:52:29.640715 I  TaskQueue Thread Running.

Master backend :

014-06-19 21:03:24.906740 I  MainServer: MainServer::ANN Monitor
2014-06-19 21:03:24.906755 I  MainServer: adding: living-room as a client (events: 1)
2014-06-19 21:03:24.906829 I  MythSocket(8466b98:42): write -> 42 2       OK
2014-06-19 21:03:29.566874 I  MythSocket(8462480:44): read  <- 44 27      MYTH_PROTO_VERSION 82 IdIdO
2014-06-19 21:03:29.566973 I  MythSocket(8462480:44): write -> 44 13      ACCEPT[]:[]82
2014-06-19 21:03:29.567715 I  MythSocket(8462480:44): read  <- 44 30      ANN[]:[]Monitor[]:[]home[]:[]0
2014-06-19 21:03:29.567764 E  MainServer: Received malformed ANN query
2014-06-19 21:03:29.567834 I  MythSocket(8462480:44): write -> 44 29      ERROR[]:[]malformed_ann_query
2014-06-19 21:03:30.559889 I  MythSocket(84619e8:39): read  <- 39 80      MESSAGE[]:[]SYSTEM_EVENT SCREEN_TYPE CREATED mythnotification SEN...