Problemas con Steam en Ubuntu 12.04

[LUIS LS]

Hola Amigos, tengo ubuntu 12.04.3 y he instalado varias veces Steam y luego de actualizarse la primera vez se ciera y me da el siguiente error...
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Running Steam on ubuntu 12.04 32-bit
STEAM_RUNTIME is enabled automatically
Installing breakpad exception handler for appid(steam)/version(1383158641_client)
Installing breakpad exception handler for appid(steam)/version(1383158641_client)
Installing breakpad exception handler for appid(steam)/version(1383158641_client)
unlinked 0 orphaned pipes
removing stale semaphore last operated on by process 19266 with name 0eBlobRegistryMutex_589503154C03A91BA8F1774858ECB0B1
removing stale semaphore last operated on by process 19266 with name 0eBlobRegistrySignal_589503154C03A91BA8F1774858ECB0B1
removing stale semaphore last operated on by process 19266 with name 0emSteamEngineInstance
removing stale semaphore last operated on by process 19266 with name 0eSteamEngineLock
Installing breakpad exception handler for appid(steam)/version(1383158641_client)
[1031/125440:WARNING:proxy_service.cc(958)] PAC support disabled because there is no system implementation
Installing breakpad exception handler for appid(steam)/version(1383158641_client)
Installing breakpad exception handler for appid(steam)/version(1383158641_client)
Installing breakpad exception handler for appid(steam)/version(1383158641_client)
Installing breakpad exception handler for appid(steam)/version(1383158641_client)
Steam: An X Error occurred
X Error of failed request: BadValue (integer parameter out of range for operation)
Major opcode of failed request: 18 (X_ChangeProperty)
Value in failed request: 0x0
Serial number of failed request: 105
xerror_handler: X failed, continuing
Uploading dump (out-of-process) [proxy '']
/tmp/dumps/crash_20131031125438_1.dmp
/home/tareko/.local/share/Steam/steam.sh: línea 722: 19444 Violación de segmento (`core' generado) $STEAM_DEBUGGER "$STEAMROOT/$PLATFORM/$STEAMEXE" "$@"
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por favor si alguien sabe como solucionarlos se los agradesco.
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