At some stage early next week (exact time TBC) we will be upgrading the forums to vBulletin 4. It is a massive upgrade and will take several hours.
For those people that haven't seen vB4, it is markedly different to our current version (vB3.8.5) and may take some getting used to. As with any big aesthetic change, some of you will love it and some of you won't. For the record - I do.
There are bound to be some bugs but we've been testing for a while now so I hope (and pray) that those will be minimal. I will start a thread for you to post anything that you notice.
I'll keep you updated with the details as they come to hand.