This may or may not be related to the fact that opening wide pdfs in docview mode causes the width to be shrunk to fit on the screen.  The height, however, is not affected.  I haven't filed a bug about that since I hadn't noticed it before.  If it's not resolved with the fix to this bug (or if you just prefer it), then I'll open another bug about it.

I'm on 10.6 in case I haven't mentioned that.

-Ivan