Comment 31 for bug 34376

The problem with the test Brian is that karmic has a main/debian-installer section and the problem occurs when main/debian-installer doesn't exist.

The problem usually manifests itself in new dists, in the -updates, -proposed, and -backports trees, and maybe even security.

If you want to test it you need to test it against a dist that doesn't have a debian-installer section at the moment like natty-updates.