After me and my friend updated to 1.2 we aren't able to play at any punkbuster server. It says we get kicked because of duplicate guid.

We are sitting on a shared internet connection (NAT), and have each out copy of the game, and each our cd-key.

There has been a problem with punkbuster and nat in earlier versions, but then we only got kicked when both tried to connect to the same... Now, with patch 1.2 we get kicked if only one of us joins a game.

What the hell is happening?