World of Warcraft exploit PKs servers - Its now Fixed

"Last night several realms did experience technical issues in regard to an exploit. This exploit was hot fixed within a couple of hours after it was discovered and the problem no longer exists." Damron wouldn't specify what caused the bug, but we have since heard it may involve a problem with the user logging mechanism in the game's arena mode. We won't go into more detail because the internet already suffers enough entropy, thank you very much.

http://wowbreak.com/stories/page/2