Whilst I think the new site design is crisp & fresh it does have atleast one change which I would appreciate made.
When you click on a thread & it opens up, the left hand cell which contains a list of the other threads within the group is too wide. It compresses the "Important" centre cell which contain the thread replies. I would be inclined to remove this cell completely allowing visitors to hit the back button to view the subject index listing.
I don't like to complain, but I am finding this most annoying, inconvenient & it detracts from all the hard efforts put in by the team.