thunderbird-bin crashed with signal 5 in _XError()

[Vish]

Binary package hint: thunderbird

On login , while starting the different apps , started thunderbird , but thunderbird crashed.
When thunderbird was started again , thunderbird opened without problem.

ProblemType: Crash
Architecture: i386
CheckboxSubmission: 417990aadff2335cd485c57bb06c8968
CheckboxSystem: 5484a8dd99f006173bd2ac53fa4837c2
Date: Thu Sep 3 01:37:53 2009
DistroRelease: Ubuntu 9.10
ExecutablePath: /usr/lib/thunderbird/thunderbird-bin
Package: thunderbird 2.0.0.23+build1+nobinonly-0ubuntu1
ProcCmdline: /usr/lib/thunderbird/thunderbird-bin
ProcEnviron:
 LANGUAGE=en_US.UTF-8
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-9.29-generic
Signal: 5
SourcePackage: thunderbird
StacktraceTop:
 ?? () from /usr/lib/libgdk-x11-2.0.so.0
 _XError () from /usr/lib/libX11.so.6
 _XReply () from /usr/lib/libX11.so.6
 XQueryTree () from /usr/lib/libX11.so.6
 ?? ()
Title: thunderbird-bin crashed with signal 5 in _XError()
Uname: Linux 2.6.31-9-generic i686
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make Ubuntu better. This particular crash has already been reported and is a duplicate of bug #257483, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.