Groovy.
I like the rounded corners and revised look. It has a smart, modern feel.
Maybe it's always been this way, but I see it strongly now... The strong title header above every post could be toned down. They take a lot of room on the whole and don't add any information. In this thread, for example, having the title "A new look for HTF..." repeated before every post feels a bit much. Imagine for a multi-page thread seeing the title repeated a few hundred times would be distracting.