I'm getting no such error. Can you get to
https://mtgox.com/users/addFunds ?
Vaguely related note -- is there a way to confirm I sent BTC to the right address? I sent 15 BTC an hour or so ago and have 21 confirmations, but my balance @ MTG is what it was before I sent the coins.

I'm guessing there's no such refund for sending BTC to a nonexistant hash address?
I am able to get to that address but it keeps acting like im not sending anything... its weird. I know it can take like a hr for your btcs to show up on there but this exception thing it keeps doing is getting nerve racking.