update-manager crashed with ValueError in ./xorg_fix_proprietary.py: _system not initialized

[Thomas Schiex]

I got this crash report while I was updating my distribution using synaptic. not sure it is correlated anyway.

ProblemType: Crash
Date: Wed Feb 22 11:07:07 2012
ExecutablePath: /usr/bin/update-manager
ExecutableTimestamp: 1326448883
InterpreterPath: /usr/bin/python2.7
ProcCmdline: /usr/bin/python ./xorg_fix_proprietary.py
ProcCwd: /tmp/update-manager-ewu9xa
PythonArgs: ['/usr/bin/update-manager']
Traceback:
 Traceback (most recent call last):
   File "./xorg_fix_proprietary.py", line 160, in <module>
     if ver and apt_pkg.VersionCompare(ver, "2:1.5.0") > 0:
 ValueError: _system not initialized
UserGroups: