Microsoft has issued a cease and desist to the NeoGAF forums over Mass Effect 3 from the leaked preview build that was able to be downloaded by Xbox 360 users with access to the Xbox Live Fall Update Preview.
The preview version of Mass Effect 3 featured limited multiplayer and single player modes and unfinished models that lacked textures, missing music and place holder dialouge. This version of the game was meant as a beta and not meant to be widely available to the people in the update preview program and has since been pulled from the service. Some people managed to take a look at the files in the game and found major Mass Effect 3 story spoilers which then made their way into the GAF topic causing Microsoft to issue the site with the Cease and Desist letter.
Sources: Bioware sends GAF a Cease and Desist notice over Mass Effect 3 Spoilers – www.neogaf.com/forum/showthread.php?t=451257
