Possible Duplicate:
What can I do if I'm the victim of serial downvoting?
Serial downvoting — is it detected, and what is the threshold?
What is serial voting and how does it affect me?
I think I upset some user for some reason, because he seems to be on a downvote rampage on my StackOverflow account. I don't think it's fair at all for this to happen and he should, at least, provide a reason for it. I don't even know how to find out who he is to ask him what are his motives.
Please advise.