Jonathan et al.,
While we’re talking about whether “Catholic” (with a capital-C and without a qualifier) means “Roman Catholic” or something broader, we should also take into consideration this practical difficulty: namely, the title of this sub-forum is “Non-Catholic Religions”, which according to my understanding means “Non-RC Religions”, i.e. all those who are not in full communion with Pope Benedict XVI (including Orthodox, Protestants, and non-Christians). But if “Non-Catholic” is instead understood to mean everyone except for Roman Catholics, Orthodox, PNCC, and Old Catholics (and possibly some Lutherans and Anglicans), then the Orthodox (etc.) wouldn’t really belong on this sub-forum. Indeed where on the whole Catholic Answers Forum would they (and you) belong? We would need to have a new sub-forum titled “Catholics who aren’t in full communion with the Pope” or “Catholics who aren’t Roman Catholic” or just "Orthodox, PNCC, Old Catholics … ".
I’m not trying to be difficult, but quite frankly I just don’t see that happening.