gnome-panel crashed with SIGSEGV in gtk_container_forall()

[Carlos Eduardo Pedroza Santiviago]

Just updated from Ubuntu LTS 10.04.4 to 12.04beta.

After login, i receive this error.

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: gnome-panel 1:3.3.91-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-18.28-generic-pae 3.2.9
Uname: Linux 3.2.0-18-generic-pae i686
NonfreeKernelModules: nvidia
ApportVersion: 1.94.1-0ubuntu1
Architecture: i386
Date: Fri Mar 9 10:18:31 2012
EcryptfsInUse: Yes
ExecutablePath: /usr/bin/gnome-panel
InstallationMedia: Ubuntu 10.04.3 LTS "Lucid Lynx" - Release i386 (20110719.2)
ProcCmdline: gnome-panel
ProcEnviron:
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0xb74995ff: mov 0x50(%eax),%edx
 PC (0xb74995ff) ok
 source "0x50(%eax)" (0xaaaaaafa) not located in a known VMA region (needed readable region)!
 destination "%edx" ok
SegvReason: reading unknown VMA
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 cdrom dialout lpadmin plugdev sambashare

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make this software better. This particular crash has already been reported and is a duplicate of bug #851532, 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.