Thanks for your bugreport. It seems like you have "breezy-updates" and "breezy-security" in your sources.list but not "breezy" itself. Could you please add it (either via the software-properties from System/Administation) or via adding "deb http://archive.ubuntu.com/ubuntu breezy main restricted" to your /etc/apt/sources.list.
Then please re-run the update process. Thanks, michael ** Changed in: update-manager (Ubuntu) Status: Unconfirmed => Needs Info -- pb installing Dapper https://launchpad.net/bugs/47878 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs