Vadim,
Netscape 4.7 crashes due to a bug in the renderer.
That said, we did test the home page with Netscape 4.7, so we will have to do some more work to get it working.
We are not ignoring Netscape 4, but it does have quite a few bugs that will never be fixed. Also the people who are working on the site do not have every browser, so we do rely on reports from other users.
Using CSS makes maintaining a site wide style much easier. That is why it is used. Changing the style in one file is more efficient than changing hundreds of files.
