Request denied! We just spent the last month frantically redesinging the place. Not again, FOR A LONG TIME PLEASE! Although some alternative styles for the forums are on the cards, but it takes alot of work to get them looking tip-top.
So for the moment the forums may appear to only take up 3/4 of the screen for some people becuase you probably have a screen rez higher than 1024*768. The forums are aligned left and are set at the same width as the main site as to create continuity between the two.
We try as hard as possible to make sure as many people as possible are happy with the design, but alas, we just arent good enough to make everyone totally pleased!
Ganon, check these threads:
http://www.revo-europe.com/forum/showthread.php?t=116
http://www.revo-europe.com/forum/showthread.php?t=250