Today I saw this Error converting NSString to UTF8String question on Stack Overflow. There were some incorrect answers. I down-voted them all. I lost some points too (I know down-voting answer will cost -1 Rep). Later these answers were deleted. But till now I didn't get the lost reputation back.
In previous times, I got the lost reputation when a down-voted answer was deleted, but today it not. Is there any change in the down-vote reputation scheme ? Or is that a bug ?