Yeah, how come nobody is taking advantage of arbitrage on this discrepancy?
Like, sell 500 @ 0.005600 on BTCT = 2.8 btc
Transfer your bitcoin to bitfunder, then buy 500 @ 0.004790 = 2.395

You have the same shares, but gain instant 0.405 btc profit, that is 156 weeks of dividend based on last div.