Well, I don't know what happened. Today the update-manager appeared with a big list of updates to install. I gave it a try and ... it succeeded. I will close this bug report therefore - sorry for any inconvenience.
** Changed in: mime-support (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1422475 Title: package mime-support 3.54ubuntu1.1 failed to install/upgrade: Unterprozess installiertes post-installation-Skript gab den Fehlerwert 255 zurück To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mime-support/+bug/1422475/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs