I had this same problem, resetting back to the Feisty repositories then removing the cups-pdf package enabled me to upgrade. I'm guessing there's a dependency problem in the Gutsy version of cups-pdf.
-- [apport] package update-manager failed to install/upgrade: ErrorMessage: SystemError in cache.commit(): E:Couldn't configure pre-depend cupsys for cups-pdf, probably a dependency cycle. https://bugs.launchpad.net/bugs/153318 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
