compiz always using significant chunk of CPU

On my laptop, compiz is always using a significant chunk of the CPU, ranging from 15%-40%, even when I'm idle. I first noticed the increased usage during the oneiric development cycle, and now that it persists into precise.

My apologies for such a vague bug.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: compiz 1:0.9.6+bzr20110929-0ubuntu8
ProcVersionSignature: Ubuntu 3.2.0-4.10-generic 3.2.0-rc5
Uname: Linux 3.2.0-4-generic x86_64
.tmp.unity.support.test.0:

ApportVersion: 1.90-0ubuntu1
Architecture: amd64
CompizPlugins: [core,bailer,detection,composite,opengl,compiztoolbox,decor,mousepoll,resize,gnomecompat,place,wall,vpswitch,move,regex,snap,session,animation,expo,fade,workarounds,scale,ezoom,unityshell]
CompositorRunning: compiz
Date: Tue Dec 20 10:41:43 2011
DistUpgraded: Log time: 2011-12-15 16:47:27.993613
DistroCodename: precise
DistroVariant: ubuntu
EcryptfsInUse: Yes
GlAlternative: lrwxrwxrwx 1 root root 24 Mar 20 2010 /etc/alternatives/gl_conf -> /usr/lib/mesa/ld.so.conf
GraphicsCard:
 Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a42] (rev 07) (prog-if 00 [VGA controller])
   Subsystem: Lenovo Device [17aa:20e4]
   Subsystem: Lenovo Device [17aa:20e4]
MachineType: LENOVO 7454A12
PackageArchitecture: all
ProcKernelCmdLine: root=UUID=66c83d9d-bb68-4f51-995c-63e9b4ee025f ro quiet splash
SourcePackage: compiz
UpgradeStatus: Upgraded to precise on 2011-12-15 (4 days ago)
dmi.bios.date: 07/30/2008
dmi.bios.vendor: LENOVO
dmi.bios.version: 6DET28WW (1.05 )
dmi.board.name: 7454A12
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:bvr6DET28WW(1.05):bd07/30/2008:svnLENOVO:pn7454A12:pvrThinkPadX200:rvnLENOVO:rn7454A12:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 7454A12
dmi.product.version: ThinkPad X200
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.6+bzr20110929-0ubuntu8
version.ia32-libs: ia32-libs 20090808ubuntu26
version.libdrm2: libdrm2 2.4.27-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 7.11.0+git20110128.2a18d195-0ubuntu0sarvatt
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.11.0+git20110128.2a18d195-0ubuntu0sarvatt
version.xserver-xorg-core: xserver-xorg-core 2:1.10.4-1ubuntu6
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 2:2.15.901-1ubuntu4
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A