"We are still investigating, but it appears that some internal story files have been leaked," Mass Effect 3 producer Jesse Houston admitted on the company's forums.Apparently said story files aren't representative of "the final story experience," but Houston's urging fans nonetheless to skip reading them, "if they want to experience the purest form of the story in Mass Effect 3."
Perhaps even crazier in ME3 leak news, the game's private beta became notably public for people participating in the preview for the upcoming Dashboard reboot, with an approximately 13 minute video running through the entire thing. It kinda, sorta contains some light spoilers, but it's nothing you haven't already heard about in preview coverage (the beta is identical content to what we've seen of ME3 in various press events, minus co-op). As previously noted, the leaked beta is missing a variety of major technical aspects (animation issues, missing sound), so it's not the best representative of the game's final product, but it is a chance to see some early Husk murder. And boy do we like Husk murders!