desktop freezes when enabling Screenshot in ccsm

This seems to be similar to lp bug #685552 but I see this with 12.04 and the latest unity (currently 5.4.0 RC1). Instead of SIGSEGV my desktop freezes. What I usually do is go to terminal (ctrl+alt+f1) and killall Xorg. After I login, I can actually see the screenshot plugin was enabled.

How to reproduce:
1. go to ccsm
2. enable screenshot plugin

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: compiz 1:0.9.7.0~bzr2995-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-16.25-generic-pae 3.2.6
Uname: Linux 3.2.0-16-generic-pae i686
.tmp.unity.support.test.0:

ApportVersion: 1.91-0ubuntu1
Architecture: i386
CompizPlugins: [core,composite,opengl,compiztoolbox,decor,resize,mousepoll,gnomecompat,wall,snap,grid,regex,imgpng,vpswitch,screenshot,place,move,animation,expo,fade,scale,session,ezoom,workarounds,unityshell]
CompositorRunning: compiz
Date: Thu Feb 16 11:11:49 2012
DistUpgraded: Log time: 2012-01-10 09:49:06.463372
DistroCodename: precise
DistroVariant: ubuntu
GraphicsCard:
 Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0116] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: Lenovo Device [17aa:21ce]
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012)
MachineType: LENOVO 4178BSG
PackageArchitecture: all
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-16-generic-pae root=UUID=dcbb805d-ac7d-4b1a-8af9-f09103533ad8 ro quiet splash vt.handoff=7
SourcePackage: compiz
UpgradeStatus: Upgraded to precise on 2012-01-23 (24 days ago)
dmi.bios.date: 07/29/2011
dmi.bios.vendor: LENOVO
dmi.bios.version: 83ET63WW (1.33 )
dmi.board.asset.tag: Not Available
dmi.board.name: 4178BSG
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:bvr83ET63WW(1.33):bd07/29/2011:svnLENOVO:pn4178BSG:pvrThinkPadT420:rvnLENOVO:rn4178BSG:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 4178BSG
dmi.product.version: ThinkPad T420
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.7.0~bzr2995-0ubuntu1
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.xserver-xorg-core: xserver-xorg-core 2:1.11.4-0ubuntu3
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.6.99.901+git20120126-0ubuntu2
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
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20111201+b5534a1-1build2