gnome-panel crashed with SIGSEGV in g_type_check_instance_cast()

[rmmts]

Binary package hint: gnome-panel

The system is upgrade from Jaunty. I was trying to unmount a USB hard drive when it happened.

ProblemType: Crash
Architecture: i386
Date: Mon Sep 21 23:56:36 2009
DistroRelease: Ubuntu 9.10
ExecutablePath: /usr/bin/gnome-panel
NonfreeKernelModules: nvidia
Package: gnome-panel 1:2.27.92-0ubuntu4
ProcCmdline: gnome-panel
ProcEnviron:
 LANG=es_ES.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-10.34-generic
SegvAnalysis:
 Segfault happened at: 0x940a68 <g_type_check_instance_cast+40>: mov (%esi),%edx
 PC (0x00940a68) ok
 source "(%esi)" (0xaaaaaaaa) not located in a known VMA region (needed readable region)!
 destination "%edx" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: gnome-panel
StacktraceTop:
 g_type_check_instance_cast ()
 ?? () from /usr/lib/libwnck-1.so.22
 ?? () from /usr/lib/libwnck-1.so.22
 ?? () from /usr/lib/libglib-2.0.so.0
 g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
Title: gnome-panel crashed with SIGSEGV in g_type_check_instance_cast()
Uname: Linux 2.6.31-10-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 #334646, 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.