I like the new look but I have two suggestions:
1) After making a post the site should redirect me to the last page of the thread, but instead it dumps me back to the main page of the subform that I am viewing. Both the old and the new versions worked this way.
2) The Quote button which is used for replying to a specific post in a thread ought to be located on the lower righthand corner of a post instead of the upper righthand. On the old UI this was especially confusing because there was little in the UI to show that post the Quote button belonged to. Even though the new UI makes it more obvious, I still think it should be moved to the lower righthand corner.