I have one response today on Stack Overflow with 4 up votes. However, my reputation changed with +38. There was another question that was strongly disliked, but I answered. I can no longer find this question anymore (it is not listed in my "answers" tab), but when I last checked my answer was not downvoted in fact I believe my answer was not bad). Also, when I check my reputation change, only +40 is listed.
Any ideas what happened?