Apple Address Book missing cards ...


Today I have 1800+ contacts in my Apple Address Book. When I uploaded most of them from my PC when I finally switched back to my first love (in computers) and put them neatly in static groups.

Now my problem is that when I add up all my cards that are in the different groups and I see how many cards there are total (1800+) it seems there are 2 cards that are not in any of the groups.

How can I find these 2 "missing" cards? Ideas anybody?

Maybe a stupid question, but I am not able to find a solution to it. In Outlook this was easy. Do I really need to move to Entourage to solve this?