I can't seem to figure out how to accept an answer in this new layout. I also can't see the arrows for upvoting or downvoting. Is it me, or is it the layout?
There should be triangles with arrows for voting and a square with a checkmark next to answers, like in this screenshot: http://i.stack.imgur.com/IpEPg.jpg
If you could provide a screenshot and browser version info, that might help with debugging.