I just experienced a minor visual bug.
I had an answer that earned 2 down votes and 22+ upvotes, earning me the daily maximum of +200. Upon making some edits to the answer at the behest of the comments, one of the users who down voted changed their vote. Now my reputation meter shows that I gained +202 for the day.
This correctly did NOT affect my reputation, as I still only gained 200, so it is merely a minor display bug.
This appears in the achievements drop down and my reputation tab on my profile.