After reading the tail of main.log, I decided to remove package postgresql-plperl-8.2 and that solved this problem.
I think this bug report should be rephrased as: "Update manager gives error message (...) instead of informing user of problematic package(s)" -- [Intrepid] Could not calculate the upgrade https://bugs.launchpad.net/bugs/281286 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs