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

Let me know what further information I can provide to help you diagnose this problem.

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: unity-services 5.20.0-0ubuntu3
ProcVersionSignature: Ubuntu 3.2.0-58.88-generic 3.2.53
Uname: Linux 3.2.0-58-generic x86_64
.tmp.unity.support.test.0:

ApportVersion: 2.0.1-0ubuntu17.6
Architecture: amd64
CompizPlugins: [core,composite,opengl,compiztoolbox,decor,vpswitch,snap,mousepoll,resize,place,move,wall,grid,regex,imgpng,session,gnomecompat,animation,fade,unitymtgrabhandles,workarounds,scale,expo,ezoom,unityshell]
CompositorRunning: compiz
CrashCounter: 1
Date: Thu Jan 23 09:05:24 2014
DistUpgraded: Fresh install
DistroCodename: precise
DistroVariant: ubuntu
ExecutablePath: /usr/lib/unity/unity-panel-service
GraphicsCard:
 Intel Corporation Core Processor Integrated Graphics Controller [8086:0046] (rev 12) (prog-if 00 [VGA controller])
   Subsystem: Lenovo Device [17aa:215a]
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
Lsusb:
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
 Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
 Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
 Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
 Bus 002 Device 003: ID 064e:e203 Suyin Corp. Lenovo Integrated Webcam
MachineType: LENOVO 057826U
MarkForUpload: True
ProcCmdline: /usr/lib/unity/unity-panel-service
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-58-generic root=UUID=a24fe876-0d8d-43a7-b065-956f12d824b4 ro quiet splash vt.handoff=7
SegvAnalysis:
 Segfault happened at: 0x4063bd: mov (%rbx),%rdx
 PC (0x004063bd) ok
 source "(%rbx)" (0x00000002) not located in a known VMA region (needed readable region)!
 destination "%rdx" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: unity
StacktraceTop:
 ?? ()
 ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/libatk-bridge.so
 g_main_dispatch (context=0x1e2e070) at /build/buildd/glib2.0-2.32.4/./glib/gmain.c:2539
 g_main_context_dispatch (context=0x1e2e070) at /build/buildd/glib2.0-2.32.4/./glib/gmain.c:3075
 g_main_context_iterate (dispatch=1, block=<optimized out>, context=0x1e2e070, self=<optimized out>) at /build/buildd/glib2.0-2.32.4/./glib/gmain.c:3146
Title: unity-panel-service crashed with SIGSEGV in g_main_dispatch()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo vboxusers
dmi.bios.date: 03/25/2013
dmi.bios.vendor: LENOVO
dmi.bios.version: 80ET65WW (2.05 )
dmi.board.name: 057826U
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr80ET65WW(2.05):bd03/25/2013:svnLENOVO:pn057826U:pvrThinkPadEdge:rvnLENOVO:rn057826U:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 057826U
dmi.product.version: ThinkPad Edge
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.7.12-0ubuntu3
version.ia32-libs: ia32-libs 20090808ubuntu36
version.libdrm2: libdrm2 2.4.46-1ubuntu0.0.0.1
version.libgl1-mesa-dri: libgl1-mesa-dri 8.0.4-0ubuntu0.7
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 8.0.4-0ubuntu0.7
version.xserver-xorg-core: xserver-xorg-core 2:1.11.4-0ubuntu10.14
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.0-0ubuntu1.2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20111219.aacbd629-0ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.17.0-1ubuntu4.4
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20111201+b5534a1-1build3