>My guess is that you have an _input_ file that is specifying that DTD.

I'd think that too, except there's only one input source, which has no
doctype at all, and is pure XML. Now I'm starting to wonder if someone
else has something happening on this box that I don't know about, and
which is throwing a red herring.

Thanks. I'm off to sit on other peoples' desks and ask questions.

-- Brook