I tried replacing the hardy section of /var/lib/update-manager/meta-release with the info from http://changelogs.ubuntu.com/meta-release. The file then points to http://archive.ubuntu.com/ubuntu/dists/hardy-proposed/main/dist-upgrader-all/0.87.30/ReleaseAnnouncement, instead of the non-existent 0.87.27 version. However update-manager seems to overwrite the meta-release file and change it back to the 0.87.27 version whenever it runs.
I tried replacing the hardy section of /var/lib/ update- manager/ meta-release with the info from http:// changelogs. ubuntu. com/meta- release. The file then points to http:// archive. ubuntu. com/ubuntu/ dists/hardy- proposed/ main/dist- upgrader- all/0.87. 30/ReleaseAnnou ncement, instead of the non-existent 0.87.27 version. However update-manager seems to overwrite the meta-release file and change it back to the 0.87.27 version whenever it runs.