Actually, I've got a ShoutBox prob to report. Been happening for ages for me...
When I hit 'Go', the page starts to load. It stops at about half way though. To get past this, I have to click one of the links (usually the News 'n Stuff one) to reload it. My ShoutBox comment is there after I click the link.
Dunno why this happens but it's a small bug anyway. I use Opera by the way, so I'm guessing it's some sort of incompatibility.