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!
Awesome! That was one of the most asked-for feature!
And it is implemented on comments too, as a title text: Mousover the karma score of a post or comment and a little popup will give you the percentage of positive votes!
(a side effect of this is that if we see a comment at 0, we can't immediatly differentiate 1 upvote and 1 downvote from 50 upvotes and 50 downvotes, but that's pretty minor)
Many thanks to the trike apps people, and whatever volunteers helped implement, test and deploy this!
Edit: This specific fix appears to be thanks to Wesley Moore.
John implemented the new feature, I just integrated it and deployed it.