It's pretty clear that the lens is in a deeper "well" in the white model. This is consistent with the rumor that light was impinging on the camera in the white model. What you need to do is limit all light that isn't coming from directly in front of the lens. No light from the side, and definitely no light from the inside of the camera. The way to fight it if you have an SLR? Invest in an old fashioned thing called a bellows, which shields the lens from any light that isn't coming from the area you can focus on, and which doesn't do anything but add glare or make blacks in the picture more like dark gray. This deeper camera acts like a bellows, I presume, blocking any light coming through the white, more translucent body.