See Who is Upvoting/ Downvoting My Question/Answer
I've got a particular answer that got downvoted a couple of times, for reasons I don't understand. I'm not particularly concerned about the odd point of rep (though for us low-rung ladder people, it all counts!), but I'm more bothered because I really don't understand what was wrong with the answer I gave. I can understand no votes, but for it to be actively downvoted has puzzled me.
Without the downvoter commenting to my answer, I'm left stuck without any further recourse. How can I tell who downvoted it?
Please note — I'm not a saddo looking to indulge in some pathetic tit-for-tat. I'm just puzzled because the question couldn't really have a "wrong" answer.
The question is here, although I've since noticed it on another answer of mine too.