thats why I have a yubi key...worth the 30 bucks or so... (even though I think they should give them for free) the only bone that I have with mt. gox is that you (the customer) has to keep good records of all incoming and outgoing money/bitcoins. They dont seem to be able to catch their own errors. the last month, I would have lost 3k dollars had i not kept good record and let them know that my money never made it to dwolla. I guarantee they collect a lot of money by unsespecting customers. Keep good records and tell them asap when you notice a discrepancy... I dont trust them as far as i can throw them, lol.. So far, they have fixed all their "mistakes"..