Xorg crashed with SIGSEGV in EvdevMBEmuBlockHandler()

[kaushalvnu06]

jusr crashed when installing. i do'nt know the reason

ProblemType: Crash
Architecture: i386
DistroRelease: Ubuntu 9.04
ExecutablePath: /usr/bin/Xorg
MediaBuild: Ubuntu 9.04 "Jaunty Jackalope" - Release i386 (20090420.1)
Package: xserver-xorg-core 2:1.6.0-0ubuntu14
ProcAttrCurrent: unconfined
ProcCmdline: X -br -ac -noreset vt7 :0
ProcEnviron:
 LANGUAGE=
 PATH=(custom, no user)
 LANG=en_US.UTF-8
ProcVersion: Linux version 2.6.28-11-generic (buildd@palmer) (gcc version 4.3.3 (Ubuntu 4.3.3-5hostname4) ) #42-Ubuntu SMP Fri Apr 17 01:57:59 UTC 2009
Signal: 11
SourcePackage: xorg-server
StacktraceTop:
 EvdevMBEmuBlockHandler ()
 BlockHandler ()
 WaitForSomething ()
 Dispatch ()
 main ()
Title: Xorg crashed with SIGSEGV in EvdevMBEmuBlockHandler()
Uname: Linux 2.6.28-11-generic i686
UserGroups:

setxkbmap:
 xkb_keymap {
  xkb_keycodes { include "evdev" };
  xkb_types { include "complete" };
  xkb_geometry { include "pc(pc105)" };
 };