According to this: http://www.golem.de/news/bitcoin-geleakte-dokumente-belegen-massiven-diebstahl-bei-mtgox-1402-104774.html (its in german) rumors say MTGox has been stolen 744.408 Bitcoins and is also missing 55 Mio USD.

If that's true, they managed not only to loose their BTC, but also their USD. If that's true, it looks more like a planned scam.