Happened to me too. It's i686 my machine. Upgrading from dapper to edgy. Let me know if you need my log files, although they look a lot like the ones posted.
-- dist-upgrade unsuccessful: "Could not install 'nessusd'" https://launchpad.net/bugs/68422 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs