Synaptic closes shortly after starting GUI

[syscon-hh]

After selecting "SYNAPTIC" from launcher and confirming authorization, the GUI will appear and closes shortly.

This happens on several machines, i386- as well as on amd64-architecture.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: synaptic 0.75.2ubuntu8
ProcVersionSignature: Ubuntu 3.2.0-1.3-generic 3.2.0-rc2
Uname: Linux 3.2.0-1-generic x86_64
ApportVersion: 1.90-0ubuntu1
Architecture: amd64
CurrentDmesg.txt:
 [ 78.944366] init: plymouth-stop pre-start process (1386) terminated with status 1
 [ 81.881720] audit_printk_skb: 12 callbacks suppressed
 [ 81.881724] type=1400 audit(1322208108.610:22): apparmor="DENIED" operation="open" parent=1 profile="/usr/sbin/cupsd" name="/etc/pkcs11/modules/" pid=1064 comm="cupsd" requested_mask="r" denied_mask="r" fsuid=0 ouid=0
 [ 84.424017] eth0: no IPv6 routers present
Date: Fri Nov 25 09:03:07 2011
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
SourcePackage: synaptic
UpgradeStatus: Upgraded to precise on 2011-11-16 (8 days ago)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Robert Roth (evfool)]

Could you please check after trying to start (and after synaptic has crashed) if there is anything in /var/crash? If there is a _usr_sbin_synaptic*****.crash file, please attach it here, for us to be able to investigate the issue, as I can't reproduce this locally using neither 11.10, nor 12.04 or 12.10.

[b49P23TIvg (b49p23tivg)]

Ubuntu 12.10 \n \

This is my current issue, synaptic works (obviously only to the extent I've tested, I think I installed gtk2 developer with it) in this release. evolution gives me a new kind of hell--->that's for a different forum.