compiz.real crashed with SIGSEGV in _XSend()

[spinstartshere]

Binary package hint: compiz

Error occured when I tried running compiz.

ProblemType: Crash
Architecture: i386
CrashCounter: 1
DistroRelease: Ubuntu 9.04
ExecutablePath: /usr/bin/compiz.real
Package: compiz-core 1:0.7.9+git20090211-0ubuntu3
ProcCmdline: /usr/bin/compiz.real --ignore-desktop-hints --replace --indirect-rendering --replace core ccp
ProcEnviron:
 PATH=(custom, user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
Signal: 11
SourcePackage: compiz
StacktraceTop:
 _XSend () from /usr/lib/libX11.so.6
 _XFlush () from /usr/lib/libX11.so.6
 XQueryExtension () from /usr/lib/libX11.so.6
 XInitExtension () from /usr/lib/libX11.so.6
 XextAddDisplay () from /usr/lib/libXext.so.6
Title: compiz.real crashed with SIGSEGV in _XSend()
Uname: Linux 2.6.28-7-generic i686
UserGroups: adm admin audio cdrom dialout dip floppy fuse lpadmin mythtv netdev plugdev powerdev pulse pulse-access pulse-rt sambashare scanner vboxusers video