Well, I upgraded to 4.2.1 yesterday and it totally messed up my camera function and photo library. Everytime I try to access the camera or my photo library, it's stating that it rebuilding/updating my library and to please wait. By the time it gets to 75% completion, it just stops and goes back to the home screen. Does anyone know whats going on or is having a similar problem? I want to make a genius appointment but my schedule is booked for the next week.