Two things:  1.  Word to the wise please be careful with your bets and addresses while playing here. Unfortunately I had an incident this weekend that cost me .8 BTC. I placed a bet for .1 BTC at directbet and then copied another address that I was going to send to from my wallet. Unfortunately it seemed that my "copy" didn't take and I sent a second bet to directbet that I meant to go to another of my wallets. Unfortunately at directbet there is nothing you can do when that happens, you're screwed.

2.  Why do you even show a bet as "negotiate" when the max bet size is 0?  It's really annoying and doesn't make sense to me. If the max bet size is 0 then just don't show the bet as an option, since it won't even give you an address anyway.