unity-2d-launcher crashed with SIGSEGV in QPainter::fillRect()

[Alex N.]

Started Ubuntu 11.10 Beta 1 via virt-manager with cirrus Video enabled. It appeared the system tries to draw the launcher bar, but fails. So now the launcher bar is not visible and the graphical interface is not usable.

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: unity-2d-launcher 4.4.0-0ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-9.15-generic 3.0.3
Uname: Linux 3.0.0-9-generic i686
Architecture: i386
CrashCounter: 1
Date: Sun Sep 4 17:27:46 2011
ExecutablePath: /usr/bin/unity-2d-launcher
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta i386 (20110901)
ProcCmdline: unity-2d-launcher
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x10c6d56: movntdq %xmm0,(%edi)
 PC (0x010c6d56) ok
 source "%xmm0" ok
 destination "(%edi)" (0xb0bf3000) in non-writable VMA region: 0xb0bf3000-0xb0bfa000 r--p /usr/share/icons/hicolor/icon-theme.cache
SegvReason: writing VMA /usr/share/icons/hicolor/icon-theme.cache
Signal: 11
SourcePackage: unity-2d
StacktraceTop:
 ?? () from /usr/lib/i386-linux-gnu/libQtGui.so.4
 ?? () from /usr/lib/i386-linux-gnu/libQtGui.so.4
 ?? () from /usr/lib/i386-linux-gnu/libQtGui.so.4
 ?? () from /usr/lib/i386-linux-gnu/libQtGui.so.4
 QPainter::fillRect(QRect const&, QBrush const&) () from /usr/lib/i386-linux-gnu/libQtGui.so.4
Title: unity-2d-launcher crashed with SIGSEGV in QPainter::fillRect()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make Ubuntu better. This particular crash has already been reported and is a duplicate of bug #833420, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.