(I can't reproduce this yet.) I'm not yet sure if this is an exact dupe of bug 1055190, but that is the same error happening from software- properties-gtk. It may be aptdaemon's bug. Thanks.
** Also affects: aptdaemon (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1055055 Title: [Ubuntu Quantal]Update-manager cannot be opened To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/aptdaemon/+bug/1055055/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs