Are you still stuck at 1024x768?

Average resolutions are now a bit higher than that, with 1440x900 and 1280x1024 becoming the most common.

The forum does fit on a screen that size, but with the page scrolled slightly right to remove the left-hand blue shadow, which I agree is a bit of a hassle. If I get enough people complaining that it can't be viewed on smaller displays I will have another think about the width of the site.