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

Crash occurs when trying to interact with volume control indicator in unity-2d inside NX/VNC session.
unity-2d-panel also crashes at the same moment.

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: unity-services 4.20.0-0ubuntu2
ProcVersionSignature: Ubuntu 3.0.0-12.19-generic-pae 3.0.4
Uname: Linux 3.0.0-12-generic-pae i686
.tmp.unity.support.test.1:

ApportVersion: 1.23-0ubuntu2
Architecture: i386
CompizPlugins: [core,bailer,detection,composite,opengl,compiztoolbox,decor,place,vpswitch,session,resize,snap,grid,mousepoll,move,imgpng,gnomecompat,regex,wall,animation,expo,unitymtgrabhandles,workarounds,fade,ezoom,scale,unityshell]
CompositorRunning: None
CrashCounter: 1
Date: Tue Oct 4 18:25:29 2011
DistUpgraded: Fresh install
DistroCodename: oneiric
DistroVariant: ubuntu
DkmsStatus: virtualbox, 4.1.2, 3.0.0-12-generic-pae, i686: installed
EcryptfsInUse: Yes
ExecutablePath: /usr/lib/unity/unity-panel-service
GraphicsCard:
 Intel Corporation Mobile 945GM/GMS, 943/940GML Express Integrated Graphics Controller [8086:27a2] (rev 03) (prog-if 00 [VGA controller])
   Subsystem: Lenovo ThinkPad T60/R60 series [17aa:201a]
   Subsystem: Lenovo ThinkPad T60/R60 series [17aa:201a]
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta i386 (20110901)
MachineType: LENOVO 19524TG
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcCmdline: /usr/lib/unity/unity-panel-service
ProcEnviron:
 SHELL=/bin/bash
 LANG=en_US.UTF-8
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-12-generic-pae root=UUID=f1955d63-e57d-4423-973a-840df6086b42 ro crashkernel=384M-2G:64M,2G-:128M quiet splash pcie_aspm=force elevator=noop vt.handoff=7
SegvAnalysis:
 Segfault happened at: 0xb7225ee6 <gdk_window_new+870>: mov 0x10(%eax),%eax
 PC (0xb7225ee6) ok
 source "0x10(%eax)" (0x00000010) not located in a known VMA region (needed readable region)!
 destination "%eax" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: unity
StacktraceTop:
 gdk_window_new () from /usr/lib/libgdk-3.so.0
 ?? () from /usr/lib/libido3-0.1.so.0
 g_cclosure_marshal_VOID__VOID () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
 ?? () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
 g_closure_invoke () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
Title: unity-panel-service crashed with SIGSEGV in gdk_window_new()
UnitySupportTest: Error: command ['/usr/lib/nux/unity_support_test', '-p', '-f'] failed with exit code 1: Error: no composite extension
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin cdrom dialout disk lpadmin netdev plugdev sambashare vboxusers
dmi.bios.date: 04/01/2010
dmi.bios.vendor: LENOVO
dmi.bios.version: 79ETE6WW (2.26 )
dmi.board.name: 19524TG
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:bvr79ETE6WW(2.26):bd04/01/2010:svnLENOVO:pn19524TG:pvrThinkPadT60:rvnLENOVO:rn19524TG:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 19524TG
dmi.product.version: ThinkPad T60
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.6+bzr20110929-0ubuntu2
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+7ubuntu7
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
xinput:
 "pointer" id=0 [XPointer]
 "keyboard" id=1 [XKeyboard]