Just occasionally, I lose two rep as if I've been downvoted, but no downvote shows in either my own rep tracker or the one on Stack Overflow itself. It's just happened now — my reputation went up 13 since my last check, which was one accepted answer and one "invisible" downvote.
Would a downvote which was cancelled have this effect, which would then be erased on the next recalc? Or is there really a downvote out there, but I just can't see it for some reason? Is there any way a rep recalc could cost me just two points?
I guess this is likely to be a question only Jeff and the team can answer for certain, but I'd like to see some educated guesses too :)
(Obviously, the amount of rep involved is inconsequential — I'm just interested in the anomaly. Once I know why it happens, I probably won't even care much about whether it will be fixed....)