I don't know but you should add link blurring to your images (Atleast the mapped ones). You mean NS4.x don't you. Well the problem could run very deep - you best start over... It could be as simple as hiding/showing being done wrong. Also need to adjust margins - top has a small gap, but otherwise,keep going.
Actually it's only imgOn() isn't it - so it can't be too hard to pin down. Just test it again and see where it is going wrong.
P.S. You have a img holding the place for the menu right? Well I think Netscape cannot load a new src, and change it's size - it keeps the new src at the originally specified one - so I guess it looks really small does it?
(I have not tested in NS4.8)
Well apparently you can write to an ilayer - but screw that, I say ignore NS <6 anyway!
b2 - benbiddington@surf4nix.com