We upgraded the site design, but tried to keep the same feel to the forums. We've gradually been adding extra custom coded things so that the site has all of the features we were previously used to, plus some really handy extra ones (such as the fantastic Showcase add-on).
However, the site has been really quiet since the upgrade - the traffic is around a third of what it was, even though we have re-directs in place and made an effort for a smooth transition. I'm really surprised, as it works so much better than it did before (IMO).
I'd really appreciate you guys casting your eyes over the site to see if you can spot where we can make improvements .