Bitcoinera is scam do not use

It would seem to me that someone with a verified account on both Bitstamp and Mt. Gox has an obvious arbitrage opportunity.  That is, that the difference in price ( (134.5-124./134.5 = 7.2% ) is greater than net amount of fees through the transfer process:  (bank -> bitstamp -> buy bitcoins -> Mt. Gox -> sell bitcoins -> bank).  Maybe I am incorrect here as I haven't tried it yet.....  has anyone attempted to take advantage of this?