It seems that if you look at the column on the right of the page, you can see upvotes and downvotes separately for recent posts. The same [n, m] format is displayed for recent comments, but it doesn't seem to actually sync with the score displaying on the comment. This feature only seems available on the sidebar: looking at the actual comment or post doesn't give you this information.
Thanks, whoever did this!
Demo: upvote or downvote this comment all over the place.
And for comparison - whatever you do, don't vote on this comment.
(note: this has been voted on. Go find your own non-voted comment somewhere. Sheesh)