Okay so I was just playing around with Photo Booth on my new macbook 2.4. When trying to take a picture with my own added photo backdrop, the picture mostly turns out patchy if you get what I mean. Is this normal? Also, sometimes after taking a picture (again, with the 'add own backdrop' effect), my photo booth window will darken and to restore, I have to click on 'normal' again before going back to the effect. I hope there isn't anything wrong with my macbook! Anybody knows what's going on? Let me know, TIA!