gnome-panel crashed with SIGSEGV in g_signal_emit_valist()

Hello!

1) I have tested Edubuntu amd 64 (e6bd2b8f213d186c95fd4dbb6562477b *raring-dvd-amd64.iso 20130130), on live-usb persistent.
2) I have installed "YouTube" app.
3) On the dash, I have search "youtube" and clicked on icon "YouTube" an click by secondary button of mouse, and clicked on "Launch"
4) gnome-panel crashed.

ProblemType: Crash
DistroRelease: Ubuntu 13.04
Package: gnome-panel 1:3.6.2-0ubuntu3
ProcVersionSignature: Ubuntu 3.8.0-2.6-generic 3.8.0-rc4
Uname: Linux 3.8.0-2-generic x86_64
ApportVersion: 2.8-0ubuntu3
Architecture: amd64
CasperVersion: 1.330
Date: Wed Jan 30 21:30:58 2013
ExecutablePath: /usr/bin/gnome-panel
GsettingsChanges:

LiveMediaBuild: Edubuntu 13.04 "Raring Ringtail" - Alpha amd64 (20130130)
MarkForUpload: True
ProcCmdline: gnome-panel
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7fe77d10c1c8: mov 0x80(%rax),%edx
 PC (0x7fe77d10c1c8) ok
 source "0x80(%rax)" (0xaaaaaaaaaaaaab2a) 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/x86_64-linux-gnu/libgtk-3.so.0
 ?? () from /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
 ?? () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
 g_signal_emit_valist () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
 g_signal_emit () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
Title: gnome-panel crashed with SIGSEGV in g_signal_emit_valist()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo