Launching Expo is broken if Blender3D is running under compiz (until the system is restarted)

If I enter expo mode (or switch virtual Desktops) with Blender3D running, compiz becomes unusable. I have not tried with any other 3D programs, or with the Cube. It remains unusable until I quit blender and start compiz again - but entering expo (even after blender is closed and compiz restarted) causes the same problem until the system is restarted.

The bug is definitely reproducable.

Even if kill X with ctrl+alt+backspace (I enabled this on the system for issues like this) - it still happens when I log in again.
I've lost files because of it - because there is no way to recover (and my laptop screen is broken, so I'm using an external monitor with proprietary nvidia drivers, which means ttys don't show on it).

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: compiz 1:0.9.7.0~bzr2995-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-15.24-generic 3.2.5
Uname: Linux 3.2.0-15-generic x86_64
NonfreeKernelModules: nvidia
.proc.driver.nvidia.gpus.0: Error: [Errno 21] Is a directory: '/proc/driver/nvidia/gpus/0'
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.version:
 NVRM version: NVIDIA UNIX x86_64 Kernel Module 290.10 Wed Nov 16 17:39:29 PST 2011
 GCC version: gcc version 4.6.2 (Ubuntu/Linaro 4.6.2-12ubuntu1)
.tmp.unity.scope.cities: Error: [Errno 21] Is a directory: '/tmp/unity-scope-cities'
.tmp.unity.support.test.0:

ApportVersion: 1.91-0ubuntu1
Architecture: amd64
CompizPlugins: [core,composite,opengl,decor,annotate,dbus,mousepoll,grid,extrawm,imgsvg,imgpng,widget,vpswitch,imgjpeg,regex,commands,compiztoolbox,text,resize,put,wall,place,water,firepaint,animation,session,move,gnomecompat,shift,resizeinfo,workarounds,blur,bicubic,notification,splash,wobbly,animationaddon,obs,expo,fade,showdesktop,trailfocus,ezoom,scale,group,unityshell,scaleaddon,scalefilter]
CompositorRunning: None
Date: Tue Feb 14 13:04:57 2012
DistUpgraded: Log time: 2010-01-19 18:02:12.600225
DistroCodename: precise
DistroVariant: ubuntu
GraphicsCard:
 NVIDIA Corporation G96 [GeForce 9600M GT] [10de:0649] (rev a1) (prog-if 00 [VGA controller])
   Subsystem: Hewlett-Packard Company Device [103c:30f4]
JockeyStatus:
 xorg:nvidia_current - NVIDIA accelerated graphics driver (Proprietary, Enabled, In use)
 xorg:nvidia_current_updates - NVIDIA accelerated graphics driver (post-release updates) (Proprietary, Disabled, Not in use)
MachineType: Hewlett-Packard HP Pavilion dv7 Notebook PC
PackageArchitecture: all
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-15-generic root=UUID=70105fd5-f734-4910-8273-68fc37288a93 ro
SourcePackage: compiz
UpgradeStatus: Upgraded to precise on 2010-01-19 (755 days ago)
dmi.bios.date: 12/04/2008
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: F.23
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 30F4
dmi.board.vendor: Compal
dmi.board.version: 99.90
dmi.chassis.type: 10
dmi.chassis.vendor: Compal
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnHewlett-Packard:bvrF.23:bd12/04/2008:svnHewlett-Packard:pnHPPaviliondv7NotebookPC:pvrF.23:rvnCompal:rn30F4:rvr99.90:cvnCompal:ct10:cvrN/A:
dmi.product.name: HP Pavilion dv7 Notebook PC
dmi.product.version: F.23
dmi.sys.vendor: Hewlett-Packard
version.compiz: compiz 1:0.9.7.0~bzr2995-0ubuntu1
version.ia32-libs: ia32-libs 20090808ubuntu33
version.libdrm2: libdrm2 2.4.30-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 8.0~rc2-0ubuntu5
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 8.0~rc2-0ubuntu5
version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.11.4-0ubuntu1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.6.99.901-1ubuntu3
version.xserver-xorg-video-ati: xserver-xorg-video-ati N/A
version.xserver-xorg-video-intel: xserver-xorg-video-intel N/A
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A