Comment 7 for bug 202170

After a lengthy discussion in #ubuntu-bugs this evening, I tracked this down to ubufox. It was only triggered it one case - installing totem-mozilla with ubufox (the Ubuntu Firefox plugin finder). As Xubuntu is the only derivative that doesn't have either both or neither of ubufox and totem-mozilla, it should only have been commonly triggered on Xubuntu systems.

I have notified asac and submitted a patch. This can no longer affect new systems. Thanks must go to kahrytan for bringing the issue up!

As for existing affected systems, we unfortunately cannot do much. Resolution is as simple as removing 'web' from /etc/apt/sources.list, but it is impossible to do that automatically, both for policy and technical reasons. We could fix it with an update, except that the entire problem is that it breaks updates.