An exploit for Primedice has been found. http://pastie.org/9577897
The code at that pastie (instructs user to run Javascript in console for guaranteed jackpot) actually withdraws user's balance to 19Nft7skg4RdH7P43XYcCSYRzZwQiTy6PE
Looks like at least a few tricked, about 0.3 BTC in about 15 minutes