writes "Former Skype guy Yee Lee finds out that for people working at companies controlled by private equity firm Silver Lake, 'vested' doesn't mean what you think it means, and gets no money from the stock options he thought he could exercise. 'Skype spokesman Brian O'Shaughnessy said, "You've got to be in it to win it. The company chose to include that clause in the contract in order to retain the best and the brightest people to build great products. This individual chose to leave, therefore he doesn't get that benefit."'
Fortune also has the story: http://finance.fortune.cnn.com/2011/06/24/skype-vesting_controversy/"Link to Original Source