I've reconciled my gains each day, no issues, and I've compared the gains to the swings in market value between the exchanges cited on btc-arbs. they pencil, they seem to be legit to me.

Just do the simple math comparing the spot price of btc/usd on both btc-e and bitstamp, they are always a solid 2% different, so long as that fact remains, the ability to conduct arbitrage is valid.

What am I missing? My balance us up from when I started, I haven't bothered to try withdrawing yet, but I had no issues depositing (I read the directions, a little unusual but worked fine).