once the firefox is closed, system is reporting it as a crash

[jovi]

Binary package hint: firefox-3.5

Ubuntu 9.10
Firefox 3.5.2
The broser was closed normally but the system has reported it as a crash.

ProblemType: Crash
Architecture: i386
Date: Thu Aug 20 05:13:53 2009
DistroRelease: Ubuntu 9.10
ExecutablePath: /usr/lib/firefox-3.5.2/firefox
Package: firefox-3.5 3.5.2+nobinonly-0ubuntu2
ProcCmdline: /usr/lib/firefox-3.5.2/firefox https://bugs.launchpad.net/ubuntu/+source/lsb/+filebug/jE6HJz6k4JcXsV1nk0tskSiaD8C?field.title=lsb_release+crashed+with+ImportError+in+%3Cmodule%3E%28%29
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_IN
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-6.25-generic
Signal: 5
SourcePackage: firefox-3.5
StacktraceTop:
 ?? () from /usr/lib/libgdk-x11-2.0.so.0
 _XError () from /usr/lib/libX11.so.6
 _XReply () from /usr/lib/libX11.so.6
 XGetWindowProperty () from /usr/lib/libX11.so.6
 ?? () from /usr/lib/xulrunner-1.9.1.2/libxul.so
Title: firefox crashed with signal 5 in _XError()
Uname: Linux 2.6.31-6-generic i686
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare