iSight not working in Photo Booth with NEW MacBook Air?

I purchased an 11" MacBook Air and received it on May 29, 2014. When I got it, I had no problems with the webcam. Now, whenever I open Photo Booth, it doesn't load. All it shows is a white loading icon on a black screen. My webcam works in FaceTime, Skype, etc., but not Photo Booth. I've tried it in test user, I've tried SCM and PRAM reset, I've re-installed Mavericks, and I've installed the combo update, and nothing has worked. What could be the problem, and how can I resolve it?