unity-2d-launcher crashed with SIGSEGV

[janderson3m]

runing system

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: unity-2d-launcher 4.2.0-0ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-9.15-generic 3.0.3
Uname: Linux 3.0.0-9-generic x86_64
Architecture: amd64
Date: Tue Aug 30 08:04:04 2011
ExecutablePath: /usr/bin/unity-2d-launcher
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Alpha amd64 (20110829.1)
ProcCmdline: unity-2d-launcher
ProcEnviron:
 LANGUAGE=pt_BR:pt:en
 PATH=(custom, no user)
 LANG=pt_BR.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7fcdec666295: cmp 0x28(%rbx),%rdi
 PC (0x7fcdec666295) ok
 source "0x28(%rbx)" (0x00000069) not located in a known VMA region (needed readable region)!
 destination "%rdi" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: unity-2d
StacktraceTop:
 ?? () from /usr/lib/x86_64-linux-gnu/libQtDeclarative.so.4
 ?? () from /usr/lib/x86_64-linux-gnu/libQtDeclarative.so.4
 ?? () from /usr/lib/x86_64-linux-gnu/libQtDeclarative.so.4
 ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
 ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
Title: unity-2d-launcher crashed with SIGSEGV
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

[Apport retracing service (apport)]

StacktraceTop:
 QDeclarativePropertyCache::property (engine=<optimized out>, obj=0xc74690, name=@0x7fff24d39808, local=...) at qml/qdeclarativepropertycache.cpp:398
 QDeclarativeObjectScriptClass::queryProperty (this=0xcb2fc0, obj=<optimized out>, name=@0x7fff24d39808, flags=<optimized out>, evalContext=0x0, hints=...) at qml/qdeclarativeobjectscriptclass.cpp:167
 QDeclarativeObjectScriptClass::queryProperty (this=0xcb2fc0, object=<optimized out>, name=@0x7fff24d39808, flags=<optimized out>) at qml/qdeclarativeobjectscriptclass.cpp:147
 QScript::DeclarativeObjectDelegate::getOwnPropertySlot (this=0xc98440, object=0x7fcddc8fafc0, exec=0x7fcddc942048, propertyName=..., slot=...) at bridge/qscriptdeclarativeobject.cpp:74
 fastGetOwnPropertySlot (slot=..., propertyName=..., exec=0x7fcddc942048, this=0x7fcddc8fafc0) at ../3rdparty/javascriptcore/JavaScriptCore/runtime/JSObject.h:382