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

[UbuntuUser]

Gnome settings crashed. Then unity-panel-service crashed in sequence. I was using firefox at the time.

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: unity-services 4.10.2-0ubuntu2
ProcVersionSignature: Ubuntu 3.0.0-9.14-generic 3.0.3
Uname: Linux 3.0.0-9-generic x86_64
Architecture: amd64
CompizPlugins: [core,bailer,detection,composite,opengl,decor,mousepoll,vpswitch,regex,animation,snap,expo,move,compiztoolbox,place,grid,imgpng,gnomecompat,wall,ezoom,workarounds,resize,fade,unitymtgrabhandles,scale,session,unityshell]
CompositorRunning: None
CrashCounter: 1
Date: Wed Aug 31 01:59:12 2011
DistUpgraded: Log time: 2011-08-18 02:03:52.470869
DistroCodename: oneiric
DistroVariant: ubuntu
ExecutablePath: /usr/lib/unity/unity-panel-service
GraphicsCard:
 Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a42] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: Hewlett-Packard Company Device [103c:360b]
   Subsystem: Hewlett-Packard Company Device [103c:360b]
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
MachineType: Hewlett-Packard HP G60 Notebook PC
ProcCmdline: /usr/lib/unity/unity-panel-service
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, no user)
 LANG=en_US.UTF-8
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.0.0-9-generic root=UUID=9cedcd1c-db46-49fc-81bd-3cb53bc39b89 ro quiet splash vt.handoff=7
SegvAnalysis:
 Segfault happened at: 0x7f4f152f6400 <g_hash_table_lookup+32>: callq *0x30(%rbx)
 PC (0x7f4f152f6400) ok
 source "*0x30(%rbx)" ok
 destination "(%rsp)" (0x7fffb88c7000) not located in a known VMA region (needed writable region)!
 Stack memory exhausted (SP below stack segment)
SegvReason: writing unknown VMA
Signal: 11
SourcePackage: unity
StacktraceTop:
 g_hash_table_lookup () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 ?? () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
 g_signal_emit_valist () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
 g_signal_emit () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
 ?? () from /usr/lib/libgtk-3.so.0
Title: unity-panel-service crashed with SIGSEGV in g_hash_table_lookup()
UdevDb: Error: [Errno 2] No such file or directory
UpgradeStatus: Upgraded to oneiric on 2011-08-26 (5 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare vboxusers
dmi.bios.date: 08/18/2009
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: F.51
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 3612
dmi.board.vendor: Wistron
dmi.board.version: 09.65
dmi.chassis.asset.tag: Chassis Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Wistron
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnHewlett-Packard:bvrF.51:bd08/18/2009:svnHewlett-Packard:pnHPG60NotebookPC:pvr038F120003200C10000020000:rvnWistron:rn3612:rvr09.65:cvnWistron:ct10:cvrChassisVersion:
dmi.product.name: HP G60 Notebook PC
dmi.product.version: 038F120003200C10000020000
dmi.sys.vendor: Hewlett-Packard
version.compiz: compiz 1:0.9.5.92+bzr2791-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.26-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 7.11-0ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.11-0ubuntu3
version.xserver-xorg: xserver-xorg 1:7.6+7ubuntu6
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.6.0-1ubuntu13
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20110811.g93fc084-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.15.901-1ubuntu2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110411+8378443-1

[Apport retracing service (apport)]

StacktraceTop:
 g_hash_table_lookup_node (hash_return=<synthetic pointer>, key=0x135c030, hash_table=0x104f920) at /build/buildd/glib2.0-2.29.16/./glib/ghash.c:360
 g_hash_table_lookup (hash_table=0x104f920, key=0x135c030) at /build/buildd/glib2.0-2.29.16/./glib/ghash.c:1022
 handler_list_lookup (instance=0x135c030, signal_id=18) at /build/buildd/glib2.0-2.29.16/./gobject/gsignal.c:406
 signal_emit_unlocked_R (node=<optimized out>, detail=0, instance=0x135c030, emission_return=0x0, instance_and_params=0x2026d80) at /build/buildd/glib2.0-2.29.16/./gobject/gsignal.c:3188
 g_signal_emit_valist (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>, var_args=0x7fffb88c72e8) at /build/buildd/glib2.0-2.29.16/./gobject/gsignal.c:3002