In none of these was the person using multi-factor authentication. Mt. Gox has had Yubikey support for a while. Mt. Gox accounts now support Google Authenticator: - https://mtgox.com/press_release_20120605.html
And another report. Mt. Gox now has Google Authenticator support, for mobile (Android, iPhone/iPad/iPod Touch (any iOS), BlackBerry). Use it, love it!