I can confirm that it's possible to reset/crash etc during a breezy to dapper upgrade and still have the system think that it's been upgraded. Only afterwards is it evident that some steps were not completed.
-- Aborted Breezy-to-Dapper upgrade, yet seems to have upgraded https://launchpad.net/bugs/59467 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
