compiz.real crashed with SIGSEGV when activating opacity plugin

[hype]

Binary package hint: compiz

When activating opacity plugin, ccsm crashes.

Then compiz becomes unstable, and particularly crashes when a tooltip appears.

ii compiz 1:0.8.2-0ubuntu7
ii compizconfig-settings-manager 0.8.2-0ubuntu1

OpenGL renderer string: GeForce 8600 GTS/PCI/SSE2
OpenGL version string: 3.0.0 NVIDIA 180.44

Ubuntu Jaunty 64Bits

ProblemType: Crash
Architecture: amd64
CrashCounter: 1
DistroRelease: Ubuntu 9.04
ExecutablePath: /usr/bin/compiz.real
MachineType: System manufacturer P5KC
NonfreeKernelModules: nvidia
Package: compiz-core 1:0.8.2-0ubuntu7
ProcCmdLine: root=UUID=04e67626-a53b-46cc-aa65-fae290f50cb1 ro quiet splash
ProcCmdline: /usr/bin/compiz.real --ignore-desktop-hints --replace --sm-client-id 10fcb6a13bfebdec2a123921352225102600000037720028 --loose-binding core ccp
ProcEnviron:
 PATH=(custom, user)
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.28-11.41-generic
Signal: 11
SourcePackage: compiz
StacktraceTop:
 ?? () from /usr/lib/compiz/libregex.so
 ?? ()
 ?? () from /usr/lib/compiz/libobs.so
 ?? () from /usr/lib/compiz/libobs.so
 ?? ()
Title: compiz.real crashed with SIGSEGV
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare