gnome-panel crashed with SIGSEGV in gtk_container_forall()

[dino99]

crash after opening the gnome-classic session on Quantal i386

ProblemType: Crash
DistroRelease: Ubuntu 12.10
Package: gnome-panel 1:3.5.4-0ubuntu2
Uname: Linux 3.6.0-999-generic i686
ApportVersion: 2.4-0ubuntu6
Architecture: i386
Date: Mon Aug 6 18:45:59 2012
ExecutablePath: /usr/bin/gnome-panel
ProcCmdline: gnome-panel
SegvAnalysis:
 Segfault happened at: 0xb754d2eb: mov %edx,0x50(%eax)
 PC (0xb754d2eb) ok
 source "%edx" ok
 destination "0x50(%eax)" (0xaaaaaafa) in non-writable VMA region: 0xa7d9a000-0xac000000 r--p /usr/share/icons/gnome/icon-theme.cache
SegvReason: writing VMA /usr/share/icons/gnome/icon-theme.cache
Signal: 11
SourcePackage: gnome-panel
StacktraceTop:
 ?? () from /usr/lib/i386-linux-gnu/libgtk-3.so.0
 ?? () from /usr/lib/i386-linux-gnu/libgtk-3.so.0
 gtk_container_forall () from /usr/lib/i386-linux-gnu/libgtk-3.so.0
 ?? () from /usr/lib/i386-linux-gnu/libgtk-3.so.0
 ?? () from /usr/lib/i386-linux-gnu/libgtk-3.so.0
Title: gnome-panel crashed with SIGSEGV in gtk_container_forall()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin avahi-autoipd cdrom couchdb dialout dip disk fax fuse haldaemon lpadmin netdev plugdev polkituser proxy root rtkit sambashare ssh tape tty users video whoopsie www-data

[Apport retracing service (apport)]

StacktraceSource:
 #0 0xb754d2eb in gtk_viewport_size_allocate (widget=0x88cb280, allocation=0x88cb1f8) at /build/buildd/gtk+3.0-3.5.8/./gtk/gtkviewport.c:849
   [Error: /build/buildd/gtk+3.0-3.5.8/./gtk/gtkviewport.c was not found in source tree]
 #1 0xb7757000 in ?? () from /tmp/tmpZur0UU/usr/lib/i386-linux-gnu/libgtk-3.so.0
StacktraceTop:
 gtk_viewport_size_allocate (widget=0x88cb280, allocation=0x88cb1f8) at /build/buildd/gtk+3.0-3.5.8/./gtk/gtkviewport.c:849
 ?? () from /tmp/tmpZur0UU/usr/lib/i386-linux-gnu/libgtk-3.so.0

[Apport retracing service (apport)]

Thank you for your report!

However, processing it in order to get sufficient information for the
developers failed (it does not generate a useful symbolic stack trace). This
might be caused by some outdated packages which were installed on your system
at the time of the report:

libgdk-pixbuf2.0-common version 2.26.1-1ubuntu1 required, but 2.26.2-0ubuntu1 is available
libgtk-3-common version 3.5.9~git20120804.10676271-0ubuntu1~12.10~ricotz0 required, but 3.5.8-0ubuntu2 is available
libatspi2.0-0 version 2.5.4-0ubuntu1 required, but 2.5.5-0ubuntu1 is available
libgdk-pixbuf2.0-0 version 2.26.1-1ubuntu1 required, but 2.26.2-0ubuntu1 is available
libecal-1.2-15 version 3.5.4-0ubuntu2 required, but 3.5.5-0ubuntu1 is available
libglib2.0-0 version 2.33.7~git20120804.f1a13b89-0ubuntu1~12.10~ricotz0 required, but 2.33.6-1 is available
libedataserver-1.2-17 version 3.5.4-0ubuntu2 required, but 3.5.5-0ubuntu1 is available
libgtk-3-bin version 3.5.9~git20120804.10676271-0ubuntu1~12.10~ricotz0 required, but 3.5.8-0ubuntu2 is available
libgtk-3-0 version 3.5.9~git20120804.10676271-0ubuntu1~12.10~ricotz0 required, but 3.5.8-0ubuntu2 is available
libcamel-1.2-39 version 3.5.4-0ubuntu2 required, but 3.5.5-0ubuntu1 is available
libatk-bridge2.0-0 version 2.5.4-0ubuntu1 required, but 2.5.5-0ubuntu1 is available

Please upgrade your system to the latest package versions. If you still
encounter the crash, please file a new report.

Thank you for your understanding, and sorry for the inconvenience!