Comment 8 for bug 221023

to change in the dist-upgrade scripts

1.
A. or remove the http://archive.canonical.com/ubuntu/ mirror in the dist-upgrade process (update-manger -c -d)
B. or update this mirror (it is out-dated at this moment)

2.
A. adapt the webpage https://launchpad.net/ubuntu/+archivemirrors of the official archive mirrors (and if possible https://wiki.ubuntu.com/Mirrors),
since all the mirrors from this webpage were recognised as "UNKNOWN mirror", thus were commented out during the dist-upgrade, and no distupgrade was performed as a result.
B. or adapt the webpages http://www.ubuntu.com/getubuntu/upgrading (and if possible https://help.ubuntu.com/community/HardyUpgrades) to make sure the persons who upgrades uses a recognised mirror
C. adapt the update-scripts, so that the not recognised mirrors are recognised.

hth,
..