pcmanfm crashed with SIGSEGV in gtk_widget_get_toplevel() (while closing firefox)

[A H]

just attempted to close firefox window

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: pcmanfm 0.9.9-0ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-11.18-generic 3.0.4
Uname: Linux 3.0.0-11-generic i686
NonfreeKernelModules: fglrx
ApportVersion: 1.23-0ubuntu1
Architecture: i386
Config_pcmanfm_System_ubuntu: Error: [Errno 2] No such file or directory: '/etc/xdg/pcmanfm/ubuntu/pcmanfm.conf'
Date: Mon Sep 26 08:27:52 2011
ExecutablePath: /usr/bin/pcmanfm
Pref_Config_System_ubuntu:
 [Preferred Applications]
 WebBrowser=firefox.desktop
 MailClient=
ProcCmdline: pcmanfm
SegvAnalysis:
 Segfault happened at: 0x384f8a <gtk_widget_get_toplevel+106>: mov 0x38(%esi),%eax
 PC (0x00384f8a) ok
 source "0x38(%esi)" (0xaaaaaae2) not located in a known VMA region (needed readable region)!
 destination "%eax" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: pcmanfm
StacktraceTop:
 gtk_widget_get_toplevel () from /usr/lib/i386-linux-gnu/libgtk-x11-2.0.so.0
 ?? () from /usr/lib/i386-linux-gnu/libgtk-x11-2.0.so.0
 gtk_widget_create_pango_context () from /usr/lib/i386-linux-gnu/libgtk-x11-2.0.so.0
 gtk_widget_get_pango_context () from /usr/lib/i386-linux-gnu/libgtk-x11-2.0.so.0
 gtk_widget_create_pango_layout () from /usr/lib/i386-linux-gnu/libgtk-x11-2.0.so.0
Title: pcmanfm crashed with SIGSEGV in gtk_widget_get_toplevel()
UpgradeStatus: No upgrade log present (probably fresh install)
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 #838489, 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.