This problem was "fixed" by running sudo apt-get install -f
I was not aware of the fix until I tried running the Update Manager from the GNome3 desktop. I am not sure why running Update Manager in Unity failed to suggest the above action. ** Attachment added: "dist-upgrade.tar.gz" https://bugs.launchpad.net/ubuntu/+source/update-manager/+bug/834327/+attachment/2370467/+files/dist-upgrade.tar.gz -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/834327 Title: Crashed while attempting to upgrade via update manager. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/update-manager/+bug/834327/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs