compiz crashed with SIGSEGV in unity::MT::GrabHandleGroup::forEachHandle()

[Thino]

1) Description: Ubuntu precise (development branch)
Release: 12.04

2) unity:
  Installed: 5.8.0-0ubuntu2
  Candidate: 5.8.0-0ubuntu2
  Version table:
 *** 5.8.0-0ubuntu2 0
        500 http://us.archive.ubuntu.com/ubuntu/ precise/main amd64 Packages
        100 /var/lib/dpkg/status

3) Enabled Desktop Cube
4) Desktop Cube got enabled but there was a long freeze and a crash before that

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: unity 5.8.0-0ubuntu2
ProcVersionSignature: Ubuntu 3.2.0-21.34-generic 3.2.13
Uname: Linux 3.2.0-21-generic x86_64
NonfreeKernelModules: fglrx
ApportVersion: 2.0-0ubuntu2
Architecture: amd64
CrashCounter: 1
Date: Sat Mar 31 10:40:12 2012
ExecutablePath: /usr/bin/compiz
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta amd64 (20120301)
ProcCmdline: compiz
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: unity
Title: compiz crashed with SIGSEGV in unity::MT::GrabHandleGroup::forEachHandle()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make this software better. This particular crash has already been reported and is a duplicate of bug #948252, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.