Under certain lighting conditions the picture appears to change from having a whitish appearance to yellow to red and back to white, in a cyclical manner. I've tested this using Photo Booth under OS X and AIM under Windows through Boot Camp. If I'm in a bright room it's not apparent, but it shows under moderate lighting. Additionally, with only the light from the screen to illuminate my face, I can detect a slight change in the image shown through Photo Booth that looks as if the same thing is going on, although it can't be readily ascertained since the image is so dark. Has anyone experienced the same thing? Is this normal behavior?