compiz crashed with SIGSEGV in Launcher::Launcher() while un-minimizing Evolution

Binary package hint: unity

Evolution expanded (?) from being minimized but computer was unresponsive. Next, unity crashed and restarted.

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: unity 3.8.2-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.38-7.39-generic 2.6.38
Uname: Linux 2.6.38-7-generic x86_64
Architecture: amd64
Date: Sat Apr 2 23:35:51 2011
ExecutablePath: /usr/bin/compiz
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Beta amd64 (20110330)
ProcCmdline: compiz
ProcEnviron:
 LANGUAGE=en_GB:en
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7f4ee2408e88 <_ZN8LauncherC2EPN3nux10BaseWindowEP10CompScreenPKci+8216>: lea 0x480(%rsp),%rdi
 PC (0x7f4ee2408e88) ok
 insn (lea) does not access VMA
 SP (0x7fff0e0d6e70) ok
 Reason could not be automatically determined.
Signal: 11
SourcePackage: unity
StacktraceTop:
 Launcher::Launcher(nux::BaseWindow*, CompScreen*, char const*, int) () from /usr/lib/compiz/libunityshell.so
 GLWindow::glPaint(GLWindowPaintAttrib const&, GLMatrix const&, CompRegion const&, unsigned int) () from /usr/lib/compiz/libopengl.so
 FadeWindow::glPaint(GLWindowPaintAttrib const&, GLMatrix const&, CompRegion const&, unsigned int) () from /usr/lib/compiz/libfade.so
 GLWindow::glPaint(GLWindowPaintAttrib const&, GLMatrix const&, CompRegion const&, unsigned int) () from /usr/lib/compiz/libopengl.so
 PrivateGLScreen::paintOutputRegion(GLMatrix const&, CompRegion const&, CompOutput*, unsigned int) () from /usr/lib/compiz/libopengl.so
Title: compiz crashed with SIGSEGV in Launcher::Launcher()
UpgradeStatus: Upgraded to natty on 2011-03-31 (2 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare