I hosted a limit cash game last Friday and I noticied around the middle of the evening that the A

in my DN Grand Slams appears to have been "fingernailed".
There were a few players at my table that I only know so-so but I've played with them several times at other folks games. When I noticied the card, I made a big deal of commenting that I found a "damaged" card and that we needed to bring in a new deck. Later that morning, I went through the rest of the deck and didn't find any problems on any of the A's or face cards (didn't bother checking all the cards).
Has anyone else had this happen and how did you deal with it at the time? Am I just paranoid? I managed to rub out some of the indentation but I can still feel it if I try. This deck's going to be relegated to non-poker status.
The good news, we had 16 people show up for a $1/$2 limit cash game; best showing for the monthly cash game in a long time. The bad news, I lost $80 (in addition to the card issue above).