Comment 1 for bug 484040

I don't think that's a bug. Implicitly the tool should assume you're talking about the distribution you're using and not the underlying base. The shortcut you're using and the assumption that this should trigger a completion for Ubuntu should only be true when using Ubuntu.

You should add: http://ppa.launchpad.net/amsn-daily/ppa/ubuntu karmic main

If you use a shortcut and you don't define the components, then it's fair to say that the tool should use the default ones for our distribution, and these are "helena main".