I'm using Netscape 6 on a Macintosh. Maybe you can e-mail me the html page and I can look at it?
[EDIT]Never mind. Just took a look at your code. I'm not super-sweet with HTML, but I'm thinking that if you delete out the background color codes for the page and for the map table, we should be good. It shouldn't make any real difference, because the browser is supposed to ignore the color code if there are background images. Give that a try and let me see it again, please.[/EDIT]