http://www.mmo-champion.com/news-2/authenticator-accounts-hacked-icc-quests-crimson-deathcharger/

The short of it is that there is a trojan out there that is fundamentally a keylogger, but it also manages to work even if you have the Blizzard Authenticator.

So just be careful, you guys, don't get hacked! Check for this trojan and make sure you're clean.

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It's all in the reflexes.