compiz crashed with SIGSEGV in g_main_context_dispatch() from ... from CcpScreen::timeout()

I don't know exactly what causes this crash (I don't think I can reproduce it whenever I want), it happens quite often, apparently randomly, but I suspect it may be when I run many applications at the same time (I use a standard netbook, maybe the load is too heavy for it running compiz plus many other processes). Unity then restarts, no other application crashes, they're only restored on the 1st viewport instead of keeping their orginal position. Hope that helps.. Sorry for the lack of precision.

Description: Ubuntu precise (development branch)
Release: 12.04

compiz:
  Installé : 1:0.9.7.2-0ubuntu4
  Candidat : 1:0.9.7.2-0ubuntu4
 Table de version :
 *** 1:0.9.7.2-0ubuntu4 0
        500 http://fr.archive.ubuntu.com/ubuntu/ precise/main amd64 Packages
        100 /var/lib/dpkg/status

unity:
  Installé : 5.8.0-0ubuntu2
  Candidat : 5.8.0-0ubuntu2
 Table de version :
 *** 5.8.0-0ubuntu2 0
        500 http://fr.archive.ubuntu.com/ubuntu/ precise/main amd64 Packages
        100 /var/lib/dpkg/status

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: wl
ApportVersion: 2.0-0ubuntu2
Architecture: amd64
CrashCounter: 1
Date: Sun Apr 1 02:04:19 2012
ExecutablePath: /usr/bin/compiz
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20120312)
ProcCmdline: compiz
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: unity
Title: compiz crashed with SIGSEGV in g_main_context_dispatch()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo