Recently a lot of Minecraft accounts have been hacked by a bunch of people with no life. This exploit/hack has been getting real big which led to Mojang to shut down people being able to get onto servers. They have been logging in to servers with people like Notch, AntVenom ect. If you want to find out more about this here is a video that explains it in more detail. http://www.youtube.com/watch?v=US53lAyUN-8&feature=g-all-u

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