Q: 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?