I've noticed this on my MacBook Air and also on a friends MacBook so it is in no way unique to this model. In Photo Booth both models seem unable to render the effects at a moderately respectable FPS and fluidity is severely impinged. This is especially noticed when keying the background out and recording video from that. It seems to bring the MBA to it's knees! How can such a novelty application have such a drain on system resources? You would think Apple would have designed the application in mind of the constraints of these models. The MBA isn't especially cheap and if potential customers are seeing it failing to render a novelty webcam application properly I don't think they are going to be particularly impressed. I'm not particularly impressed and I've bought one. Performance in Photoshop and Illustrator is exquisite, I haven't had any problems and filters etc can be applied quickly. Photo Booth is the one application that I have noticed the MBA struggle to perform in the past week I have been using it. The iSight camera seems to be of a lower quality than for instance the MacBook due to apparent high levels of noise. iSight camera live footage appears to lag behind by about 1 second in Photo Booth and by about 3 seconds in iMovie. Has anyone else had problems in this area? The Intel GMA X3100 has proved to be great in rendering streaming Quicktime H.264 720p media from the Quicktime HD Gallery but unable to work Photo Booth properly? Doesn't seem right to me.