I have problem with USD at mtGox, but I'm from Serbia I when I contacted online support they told me that USD transfer to my country(and some others) is stopped ! So they gave me back USD on my MtGox account and I must buy coins again and then sold for euros ant then send to my bank account. So check with mtgox support if usd transfer to your country working or not. They not told me what is a reason to stoping USD transfer.