klauncher crashed with SIGSEGV in XCloseDisplay()

[themstpt]

Binary package hint: kde4libs

it appeared on my taskbar, i don't know what caused it

ProblemType: Crash
Architecture: i386
CrashCounter: 1
Date: Sat Apr 12 23:14:24 2008
DistroRelease: Ubuntu 8.04
ExecutablePath: /usr/lib/kde4/lib/kde4/libexec/klauncher
Package: kdelibs5 4:4.0.3-0ubuntu2
PackageArchitecture: i386
ProcCmdline: klauncher
ProcEnviron:
 LANGUAGE=en_US
 PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
 LANG=en_US.UTF-8
 SHELL=/bin/bash
Signal: 11
SourcePackage: kde4libs
StacktraceTop:
 XCloseDisplay () from /usr/lib/libX11.so.6
 ?? () from /usr/lib/kde4/lib/libkdeinit4_klauncher.so
 ?? ()
 ?? () from /usr/lib/libQtCore.so.4
 ?? () from /usr/lib/libQtCore.so.4
Title: klauncher crashed with SIGSEGV in XCloseDisplay()
Uname: Linux 2.6.24-16-generic i686
UserGroups: adm admin audio cdrom dialout dip floppy lpadmin netdev plugdev powerdev scanner video