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.
we can't immediatly differentiate 1 upvote and 1 downvote from 50 upvotes and 50 downvotes
You upvote the comment, look at the new percentages, and revoke the upvote.
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!