compiz.real crashed with SIGSEGV

[Broomer68]

Binary package hint: compiz

some programs were unserponsive (and grayed) but not able to do anything, including killing. not even possible to close down the system normally.
After a reboot (sudo reboot now) this crash surfaced

ProblemType: Crash
Architecture: i386
Date: Sun Jan 27 16:24:57 2008
DistroRelease: Ubuntu 8.04
ExecutablePath: /usr/bin/compiz.real
NonfreeKernelModules: nvidia
Package: compiz-core 1:0.6.99+git20080102-0ubuntu5
PackageArchitecture: i386
ProcCmdline: /usr/bin/compiz.real --ignore-desktop-hints --replace --loose-binding --sm-client-id 117f000101000120050166000000116360009 ccp
ProcCwd: /home/jeroen
ProcEnviron:
 PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
Signal: 11
SourcePackage: compiz
Stacktrace: #0 0x08055a60 in ?? ()
StacktraceTop: ?? ()
ThreadStacktrace:

Title: compiz.real crashed with SIGSEGV
Uname: Linux Athlon64-x2 2.6.24-5-generic #1 SMP Thu Jan 24 19:45:21 UTC 2008 i686 GNU/Linux
UserGroups: adm admin audio cdrom dialout dip floppy lpadmin netdev plugdev sambashare scanner video

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StacktraceTop: