firefox-bin crashed with SIGSEGV in pthread_mutex_lock()

[Lafa]

Binary package hint: firefox

not sure why I got this.
But it happened after a un-suspend that crashed my X server.
Once I logged into the X server again, I saw this message

ProblemType: Crash
Architecture: i386
CrashCounter: 1
Date: Sun Feb 28 11:01:30 2010
DistroRelease: Ubuntu 10.04
ExecutablePath: /usr/lib/firefox-3.6/firefox-bin
FirefoxPackages:
 firefox 3.6+nobinonly-0ubuntu5
 firefox-gnome-support 3.6+nobinonly-0ubuntu5
 firefox-branding 3.6+nobinonly-0ubuntu5
 abroswer N/A
 abrowser-branding N/A
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
NonfreeKernelModules: nvidia wl
Package: firefox 3.6+nobinonly-0ubuntu5
ProcCmdline: /usr/lib/firefox-3.6/firefox-bin https://bugs.launchpad.net/ubuntu/+source/linux/+filebug/lm0JAVDibnmznsTrfdEuxHkBuys?field.title=WARNING%3A+at+%2Fbuild%2Fbuildd%2Flinux-2.6.32%2Fkernel%2Fpower%2Fsuspend_test.c%3A53+suspend_test_finish%2B0x89%2F0x90%28%29
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.utf8
 LC_MESSAGES=C
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.32-14.20-generic-pae
SegvAnalysis:
 Segfault happened at: 0xb76f7430 <__kernel_vsyscall+16>: pop %ebp
 PC (0xb76f7430) ok
 source "%ebp" ok
 destination "(%esp)" (0xbf9d84f0) ok
 Reason could not be automatically determined.
Signal: 11
SourcePackage: firefox
StacktraceTop:
 pthread_mutex_lock ()
 ?? () from /usr/lib/flashplugin-installer/libflashplayer.so
 ?? () from /usr/lib/flashplugin-installer/libflashplayer.so
 ?? () from /usr/lib/flashplugin-installer/libflashplayer.so
 ?? () from /usr/lib/flashplugin-installer/libflashplayer.so
Title: firefox-bin crashed with SIGSEGV in pthread_mutex_lock()
Uname: Linux 2.6.32-14-generic-pae i686
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

[Apport retracing service (apport)]

StacktraceTop:
 pthread_mutex_lock ()
 ?? ()
 ?? ()
 ?? ()
 ?? ()

[Draycen DeCator (ddecator)]

Thank you taking the time to report this bug and helping to make Ubuntu better. However, processing the crash report to get detailed information for the developers failed as the retracer did not generate a useful symbolic stack trace.
Please try to obtain a backtrace manually following the instructions at http://wiki.ubuntu.com/DebuggingProgramCrash and upload the backtrace (as an attachment) to the bug report. This will greatly help us in tracking down your problem.

I am also going to mark this bug as Private since there are files attached that could potentially contain private data. Once it has been determined that there is no private data on the report, then it will be made public again.

[Micah Gersten (micahg)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. However, your crash report didn't yield the required information. Please go ahead and submit a new crash report if it crashes again with the latest available version of the package. Thanks in advance for your cooperation and understanding.