Comment 19 for bug 1078697

Unlike Debian, Ubuntu's post-release updates go to a separate pocket -- the release pocket is frozen and its indices are never regenerated after release. Production was upgraded from hardy to lucid between lucid and maverick, so we'd expect lucid's Sources to omit the .dsc, while maverick's would include it. Comparing the cvstrac stanzas in http://releases.ubuntu.com/ubuntu/dists/lucid/universe/source/Sources.gz and http://old-releases.ubuntu.com/ubuntu/dists/maverick/universe/source/Sources.gz would seem to confirm this.