Pages NOT taking up the entire browser space is poor coding though, according to W3C, who currently maintains modern web standards. The reason people code pages to not fill the page is because they learned to do layout with fixed tables and a fixed 640x480 resolution, THAT is very 1993. And in 1993 people used Frontpage express and such, again with fixed tables, style attributes directly on the page and suich.
People may not look at the code, but search engines will. And if you cram a bunch of Javascript and Flash and such to make it "look nice", you will garble the code.
The fixed with can't be changed without breaking compliance with several "Best practices", such as WCAG and WAI, and I care about that stuff. But like I've said I'll get to fixing the headers thing. That was a mistake on my part.