unity-panel-service crashed with SIGSEGV in g_dbus_proxy_call()

[ubername]

Not sure what happened - I appear to have a running instance of Synaptic, but it is not showing on the screen. I went to a terminal and did 'gksu synatic'
Got
Another synaptic is running. Trying to bring it to the foreground

tried
'fg' in terminal

got crash

But this same sequence does not reproduce the error.

ProblemType: Crash
DistroRelease: Ubuntu 13.04
Package: unity-services 6.12.0daily13.02.19.1-0ubuntu1
ProcVersionSignature: Ubuntu 3.8.0-7.15-generic 3.8.0
Uname: Linux 3.8.0-7-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.8-0ubuntu4
Architecture: amd64
CompizPlugins: [core,bailer,detection,composite,opengl,decor,vpswitch,mousepoll,resize,snap,place,compiztoolbox,gnomecompat,regex,imgpng,grid,move,animation,expo,workarounds,wall,session,ezoom,fade,scale,unityshell]
Date: Sun Feb 24 08:57:09 2013
ExecutablePath: /usr/lib/unity/unity-panel-service
MarkForUpload: True
ProcCmdline: /usr/lib/unity/unity-panel-service
ProcEnviron:
 SHELL=/bin/bash
 XDG_RUNTIME_DIR=<set>
 PATH=(custom, no user)
 LANGUAGE=en_GB:en
 LANG=en_GB.UTF-8
SegvAnalysis:
 Segfault happened at: 0x7f8378cb2cc8: mov (%rbx),%rdx
 PC (0x7f8378cb2cc8) ok
 source "(%rbx)" (0xaaaaaaaaaaaaaaaa) not located in a known VMA region (needed readable region)!
 destination "%rdx" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: unity
StacktraceTop:
 ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
 g_dbus_proxy_call () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
 ?? () from /usr/lib/x86_64-linux-gnu/libdbusmenu-glib.so.4
 g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
Title: unity-panel-service crashed with SIGSEGV in g_dbus_proxy_call()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip disk lpadmin plugdev sambashare sudo

[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 #1055172, 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.