Hi Guys, I just bought an external iSight and have a few questions 1) Whenever I first connect the iSight to my Mac, I hear a clicking noise from the camera. Is this normal? 2) When I use the iSight with an application, if the app is not running in the foreground, the iSight light will be off and the camera won't run. Normal? 3) Finally, throughout use, I hear a 1 second click noise. Is this just the auto focus or is the iSight supposed to be completely silent? Thanks!