Looks like a configuration problem with flashplugin-installer. What is the output of:
lsb_release -a --- Ubuntu Bug Squad volunteer triager http://wiki.ubuntu.com/BugSquad ** Changed in: update-manager (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/876145 Title: failed to properly upgrade kubuntu distribution 11.04 to 11.10 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/update-manager/+bug/876145/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs