Tom, In this game - i just took out a player who had clearly attacked me and captured some of my territories on his previous turn, so I know he should have received at least one card, yet I captured no cards.
Hmm - I can see in turn 1219 that you captured a card.
I see it in the history, but I didn't see it at the time.. The window definitely had no cards in it. And I think it even said:
Cards 0
Elimination Bonus 0.