Michel,
You might want to look at the site in IE4, there are a couple of things on my site that I just noticed are handled a little differently in IE4 than IE3.
>That might explain. At normal fonts, at 800*600, it fits ok. I don't suggest using either Netscape or IE. The choice is yours. I defined the most important features to appear the same on Netscape or IE. However, I haven't done anything for IE 4 yet. Maybe there is something different in the scale.