Comment 2 for bug 1309670

It seems like the samba-related packages were the culprit, after purging them the upgrade went fine. Attaching an excerpt from /var/log/apt/history.log, which lists the packages I had to purge in order for the upgrade to go through.

Nevertheless, I am keeping this bug report open, as these were standard packages and should have been handled gracefully by the updater. I would be glad to provide more information if someone is interested.