Comment 8 for bug 349263

I just dup'ed 349263 to this as I had the same problem. The difference is I upgraded from intrepid-backports where the same situation occurs. Dontzap isn't needed in Intrepid because of the default. We do need to add it for Jaunty, so I think that we ought to have update-manager work around this case (since upgrades from backports are a supported use case).