Oh, I got one, and we talked about it at the time. It really didn't bother me, because it was clear that it was a mistake, and probably in part Jack's early attempts at contributing. I wouldn't dwell on it. And Anna seems the forgiving type, generally.
What I find embarrassing is when I accidentally pos-rep. I do that once in a while. When I pos-rep someone, it's usually a pretty simple message with a friend, but when I neg-rep someone, it's usually not supposed to be so cordial.