Thanks for this additional information. The problem here is mozilla-thunderbird leaves auto-generated files around. It should delete them in the postrm script.
Cheers, Michael ** Also affects: mozilla-thunderbird (Ubuntu) Importance: Undecided Status: Unconfirmed ** Changed in: apt (Ubuntu) Status: Needs Info => Rejected -- purging configuration files does not do its job https://launchpad.net/bugs/54167 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs