unity-2d-launcher crashed with SIGSEGV in QMetaObject::indexOfProperty()

[fabian]

after log into system,

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: unity-2d-launcher 4.2.0-0ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-9.15-generic-pae 3.0.3
Uname: Linux 3.0.0-9-generic-pae i686
NonfreeKernelModules: fglrx
Architecture: i386
CrashCounter: 1
Date: Fri Sep 2 07:22:26 2011
ExecutablePath: /usr/bin/unity-2d-launcher
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
ProcCmdline: unity-2d-launcher
ProcEnviron:
 PATH=(custom, no user)
 LANG=pl_PL.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0xb7624098 <_ZNK11QMetaObject15indexOfPropertyEPKc+56>: mov 0x18(%eax),%esi
 PC (0xb7624098) ok
 source "0x18(%eax)" (0x8b002b75) not located in a known VMA region (needed readable region)!
 destination "%esi" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: unity-2d
StacktraceTop:
 QMetaObject::indexOfProperty(char const*) const () from /usr/lib/i386-linux-gnu/libQtCore.so.4
 ?? () from /usr/lib/i386-linux-gnu/libQtDeclarative.so.4
 ?? () from /usr/lib/i386-linux-gnu/libQtDeclarative.so.4
 ?? () from /usr/lib/i386-linux-gnu/libQtDeclarative.so.4
 ?? () from /usr/lib/i386-linux-gnu/libQtDeclarative.so.4
Title: unity-2d-launcher crashed with SIGSEGV in QMetaObject::indexOfProperty()
UpgradeStatus: Upgraded to oneiric on 2011-08-28 (4 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

[Apport retracing service (apport)]

StacktraceTop:
 QMetaObject::indexOfProperty (this=0xb74a17c8, name=0x8b67fb0 "menu") at kernel/qmetaobject.cpp:710
 QDeclarativePropertyCache::create (metaObject=0xb74a17c8, property=...) at qml/qdeclarativepropertycache.cpp:176
 QDeclarativePropertyCache::property (engine=0xb71f42e0, obj=0x8ce6ec0, name=@0xbfa908b8, local=...) at qml/qdeclarativepropertycache.cpp:408
 QDeclarativeObjectScriptClass::queryProperty (this=0x81b2ee0, obj=0x8ce6ec0, name=@0xbfa908b8, flags=..., evalContext=0x0, hints=...) at qml/qdeclarativeobjectscriptclass.cpp:167
 QDeclarativeObjectScriptClass::queryProperty (this=0x81b2ee0, object=0x8a871a0, name=@0xbfa908b8, flags=...) at qml/qdeclarativeobjectscriptclass.cpp:147