Hmm, that's odd. It's setting the width of both columns properly, the main body column has a 85% width setting and the right column has a %15 width setting. It even validates ok on the w3c validator site except for a missing alt tag and the onenter tag for the shoutbox.

I'm not sure if there's anything we can do about it as it appears it might be a safari rendering issue, but I'll test as soon as I get a chance.