I can't figure out how considering I have an impossible to guess password and have setup yubikey for withdrawels but someone emptied out my account for about 80 BTC today!

Luckily I keep most of my BTC in my own wallet but wtf can I do now? Anything? I've been trying to contact Mt Gox all day but it just keeps saying "getting an agent..."

BTW, the person that hacked my account's address is:

1JgqPGJCJWzgeMiTFbmeLi3cpKC9jahPS4


I'll give a reward if I can find out who this person is so I can beat the **** out of them!