It looks like the error was occassioned by nspluginwrapper being installed. At least it was removal of that (after removal of some other things that occassioned "Holding Back" messages in the log) that has allowed the process to finally go forward.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1162276 Title: do-release-upgrade failing from 11.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/update-manager/+bug/1162276/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
