compiz crashed with SIGSEGV in nux::GpuRenderStates::SubmitChangeStates()

Binary package hint: compiz

crashes on entering unity session.

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: compiz-core 1:0.9.2.1+glibmainloop4-0ubuntu11
ProcVersionSignature: Ubuntu 2.6.38-4.31-generic 2.6.38-rc5
Uname: Linux 2.6.38-4-generic i686
Architecture: i386
CrashCounter: 1
DRM.card0.LVDS.1:
 status: connected
 enabled: enabled
 dpms: On
 modes: 1400x1050 1280x1024 1280x960 1280x854 1280x800 1280x720 1152x768 1024x768 800x600 848x480 720x480 640x480
 edid-base64:
DRM.card0.VGA.1:
 status: disconnected
 enabled: disabled
 dpms: On
 modes:
 edid-base64:
Date: Tue Feb 22 11:18:18 2011
Disassembly: => 0x0: Cannot access memory at address 0x0
DistUpgraded: Yes, recently upgraded Log time: 2011-02-17 13:49:51.252433
DistroCodename: natty
DistroVariant: ubuntu
DkmsStatus:
 virtualbox-ose, 4.0.2, 2.6.38-4-generic, i686: installed
 virtualbox-ose, 4.0.2, 2.6.38-3-generic, i686: installed
ExecutablePath: /usr/bin/compiz
GraphicsCard:
 ATI Technologies Inc Radeon RV250 [Mobility FireGL 9000] [1002:4c66] (rev 02) (prog-if 00 [VGA controller])
   Subsystem: Acer Incorporated [ALI] Device [1025:001f]
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha i386 (20110209)
MachineType: Acer TravelMate 800
PccardctlIdent:
 Socket 0:
   no product info available
 Socket 1:
   product info: "O2Micro", "SmartCardBus Reader", "V1.0", ""
   manfid: 0xffff, 0x0001
PccardctlStatus:
 Socket 0:
   no card
 Socket 1:
   5.0V 16-bit PC Card
   Subdevice 0 (function 0) [unbound]
ProcCmdline: /usr/bin/compiz
ProcEnviron:
 LANGUAGE=en_AU:en
 LANG=en_AU.UTF-8
 LC_MESSAGES=en_AU.utf8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-4-generic root=UUID=dd267858-5cd6-488d-baaa-f103990dd6bc ro quiet splash vt.handoff=7
SegvAnalysis:
 Segfault happened at: 0x0: Cannot access memory at address 0x0
 PC (0x00000000) not located in a known VMA region (needed executable region)!
SegvReason: executing NULL VMA
Signal: 11
SourcePackage: compiz
StacktraceTop:
 ?? ()
 nux::GpuRenderStates::SubmitChangeStates() () from /usr/lib/libnux-graphics-0.9.so.0
 nux::WindowThread::RenderInterfaceFromForeignCmd() () from /usr/lib/libnux-0.9.so.0
 UnityScreen::paintDisplay(CompRegion const&) () from /usr/lib/compiz/libunityshell.so
 UnityWindow::glDraw(GLMatrix const&, GLFragment::Attrib&, CompRegion const&, unsigned int) () from /usr/lib/compiz/libunityshell.so
Title: compiz crashed with SIGSEGV in nux::GpuRenderStates::SubmitChangeStates()
UserGroups: adm admin audio cdrom dialout dip fax floppy fuse lpadmin plugdev sambashare tape vboxusers video
XsessionErrors:
 (nautilus:16232): GConf-CRITICAL **: gconf_value_free: assertion `value != NULL' failed
 (gnome-power-manager:16247): Gdk-CRITICAL **: IA__gdk_window_thaw_toplevel_updates_libgtk_only: assertion `private->update_and_descendants_freeze_count > 0' failed
 (nm-applet:16243): Gdk-CRITICAL **: IA__gdk_window_thaw_toplevel_updates_libgtk_only: assertion `private->update_and_descendants_freeze_count > 0' failed
dmi.bios.date: 03/02/2004
dmi.bios.vendor: ACER
dmi.bios.version: 4A20
dmi.board.name: TravelMate 800
dmi.board.vendor: Acer
dmi.board.version: Rev 1.0
dmi.chassis.asset.tag: ��������������������������������
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: Rev.1
dmi.modalias: dmi:bvnACER:bvr4A20:bd03/02/2004:svnAcer:pnTravelMate800:pvrRev1:rvnAcer:rnTravelMate800:rvrRev1.0:cvnAcer:ct10:cvrRev.1:
dmi.product.name: TravelMate 800
dmi.product.version: Rev 1
dmi.sys.vendor: Acer
version.compiz: compiz 1:0.9.2.1+glibmainloop4-0ubuntu11
version.libdrm2: libdrm2 2.4.23-1ubuntu3
version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.1~git20110215.cc1636b6-0ubuntu2
version.xserver-xorg: xserver-xorg 1:7.6~3ubuntu6
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.0-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-1ubuntu9
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110107+b795ca6e-0ubuntu4