Unsalted password hashes leaked...
http://it.slashdot.org/story/12/06/06/1335228/linkedin-password-hashes-leaked-online
http://www.bbc.com/news/technology-18338956
http://it.slashdot.org/story/12/06/06/1335228/linkedin-password-hashes-leaked-online
http://www.bbc.com/news/technology-18338956