I already paid my friend through Mtgox redeemable code. And I wish mtgox looks into this question.

The money is a such a small amount, I'm not angry at all. And Mtgox just send me a free Yubikey, and I really appreciate that, and feel Mtgox has the willing to invest in the future of bitcoin economy.

 but just worried about what's wrong with mtgox's back end.