I've just noticed that hovering the mouse pointer over a post's or comment's score now displays a balloon pop-up with information how large percentage of votes was positive. New feature or am I just really bad at noticing black stuff appearing suddenly on my screen?

Anyway, it's pretty nice. You can, for example, upvote a comment from 0 to 1, notice that the positive vote ratio changes only by a few percent and suddenly realize that there's a war going on in there.