Recently I asked a question on serverfault and someone commented on it, i also saw that at about the same time I lose 2 reputation points.
Do you lose reputation when someone comments? (Which sorta makes sense)
UPDATE The reason I thought it makes sense, is because usually someone only has to comment when you're question was not clear enough, or when it didn't have enough info. Since it's bad of you to leave vague questions that need explaining, I thought you'd lose rep.