Comment 6 for bug 475503

It's somewhat sad you didn't try to fix this, because it must be a bug in any case. Upgrading often creates problems after a while, but we should work to avoid that. OTOH I completely understand that you prefer cleaning your system instead of suffering from bugs all the time - indeed, Ubuntu is quite easy to reinstall when you have your date on a separate partition.

Closing the report for now, as I don't think many people will experience the same problem.