I thought he meant that the header was overlapping the document text, but
I'm not sure how it could do this since the header usually pushes the
document body down as needed. There's an old trick of setting the top margin
to an absolute amount by using a negative number (very counterintuitive); if
that's been done, then that could be one explanation. Or perhaps the header
includes some "Behind Text" elements that are overlapping the text, but they
wouldn't be cutting it off.