I've been bitten with this bug http://bugs.kerbalspaceprogram.com/issues/5154 It's pretty heartrending, i had 3 kerbals on missions, and i know 2 of them are as good as lost. They even appear on the astronaut complex as being in a mission, but once i try to control the ship, they are not there. I don't have the courage to check on the third (which BTW is Jeb of all folks ). I'm disappointed that a post-beta, compulsory patch haves such a major, game breaking bug. I play pretty much only career, and i'm almost certain my current game is as good as lost