Emacs-w3, AIR Mosaic, OmniWeb, and a few others (haven't checked out
EMosaic for a while, sorry).
The main problem is not that they set the accept headers wrong (I don't
think netscape does - are you sure its broken?), but that they do not
specify the maxsize, maxtime or quality attributes on the frigging
things. Which can completely hose things when you then send a */* at the
end, which netscape and mosaic/X both do.
-Bill Perry