Nolan Bard reports that they have fixed the dealer bug, so those of you hoping to exploit cheating opportunities in your submission bots are out of luck!

-------- Original Message --------
Subject: 	Re: Dealer bug
Date: 	Mon, 4 Apr 2011 15:56:36 -0600
From: Nolan Bard 
To: 	David Evans 

Hi David,

... effectively there was no reason for the return values
of isValidAction to be {-1,0,1}.  A return value of 0
indicates that the action is invalid, non-zero now
indicates a valid action.
...