In CS6, when dragging an image window within the workspace, PS applies what appears to be a very subtle saturation and brightness boost to the image. The effect disappears when releasing the mouse. I'm interested to know what PS is actually doing because the effect, whatever it is, makes some of my images look totally amazing, and I want to apply the effect in a layer.
It's easier to see this effect with landscape photos, although I'm sure you can see it with any image.