Netsurf is playing catchup with most browsers, as it's only been in the public domain for what, 1-2 years? Firefox came out of the open sourcing of the Netscape engine in 1998, only 5-6 years later did we see the first version of Firefox come out, so give the Netsurf guys a chance. I'm pleased with what they've done so far.
Note to hEgelia - Arcweb? Well, the usual goal is to degrade gracefully towards Netscape 4.7 (screen out CSS, produce semantic HTML). Even if it looks basic in Netscape, there's a good chance it will play nicely in Arcweb, Lynx etc.
But I agree, it's a real minefield, hence the number of sites and books on the subject. Great little cottage industry!