unity-panel-service crashed with SIGSEGV in g_variant_type_info_unref()

Crashes randomly.

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: unity-services 4.4.0-0ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-7.9-generic-pae 3.0.0
Uname: Linux 3.0.0-7-generic-pae i686
Architecture: i386
CompizPlugins: [core,bailer,detection,composite,opengl,decor,mousepoll,vpswitch,regex,animation,snap,expo,move,compiztoolbox,place,grid,imgpng,gnomecompat,wall,ezoom,workarounds,staticswitcher,resize,fade,unitymtgrabhandles,scale,session,unitydialog,unityshell]
CrashCounter: 1
Date: Mon Aug 1 19:01:50 2011
EcryptfsInUse: Yes
ExecutablePath: /usr/lib/unity/unity-panel-service
ProcCmdline: /usr/lib/unity/unity-panel-service
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, no user)
 LANG=en_US.UTF-8
SegvAnalysis:
 Segfault happened at: 0xb712764e: movzbl 0x4(%eax),%edx
 PC (0xb712764e) ok
 source "0x4(%eax)" (0x00000004) not located in a known VMA region (needed readable region)!
 destination "%edx" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: unity
StacktraceTop:
 ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
 g_variant_type_info_unref () from /lib/i386-linux-gnu/libglib-2.0.so.0
 g_variant_unref () from /lib/i386-linux-gnu/libglib-2.0.so.0
 ?? () from /usr/lib/libdbusmenu-glib.so.4
 ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
Title: unity-panel-service crashed with SIGSEGV in g_variant_type_info_unref()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin cdrom dialout libvirtd lpadmin plugdev sambashare