unity-2d-panel crashed with SIGSEGV in MenuBarWidget::onEntryRemoved()

[ARMIX]

Crash after logon.

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: unity-2d-panel 4.8.0-0ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-11.18-generic 3.0.4
Uname: Linux 3.0.0-11-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 1.23-0ubuntu1
Architecture: amd64
CrashCounter: 1
Date: Thu Sep 22 20:17:32 2011
ExecutablePath: /usr/bin/unity-2d-panel
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta amd64+mac (20110901)
ProcCmdline: unity-2d-panel
ProcEnviron:
 LANGUAGE=de_AT:de
 PATH=(custom, no user)
 LANG=de_AT.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7ff13bf050e3 <_ZN13MenuBarWidget14onEntryRemovedERKSs+131>: mov (%rdx),%rsi
 PC (0x7ff13bf050e3) ok
 source "(%rdx)" (0x265ed8f38) not located in a known VMA region (needed readable region)!
 destination "%rsi" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: unity-2d
StacktraceTop:
 MenuBarWidget::onEntryRemoved(std::string const&) () from /usr/lib/unity-2d/plugins/panel/libpanelplugin-appname.so.0
 unity::indicator::Indicator::~Indicator() () from /usr/lib/libunity-core-4.0.so.4
 boost::detail::sp_counted_impl_p<unity::indicator::Indicator>::dispose() () from /usr/lib/libunity-core-4.0.so.4
 MenuBarWidget::~MenuBarWidget() () from /usr/lib/unity-2d/plugins/panel/libpanelplugin-appname.so.0
 QObjectPrivate::deleteChildren() () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
Title: unity-2d-panel crashed with SIGSEGV in MenuBarWidget::onEntryRemoved()
UpgradeStatus: Upgraded to oneiric on 2011-09-13 (9 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare