Periodically, one of my applications does not relinquish control of my iSight. I have no idea who the culprit is, but as a result, I have to restart or login/logout. Is there any way to identify the application in question? I've closed all of my major apps out and no luck, must be a smaller process. The green iSight LED is not lit. The screenshot is from iChat. Photobooth just displays a loading indicator (like an AJAX throbber) and the camera never loads.