I’m thinking “vibrance” is a CS4 setting, I’m on CS3. Just a black and white overlay doesn’t do it because individual channels are being brightened and darkened at different levels. I’ve got a pretty close approximation with the Black & White settings and another layer overlaying color, with opacity of the color layer set to 8-10%.
I just can’t imagine Windows doing something quite so complicated. Anybody know how Microsoft is doing it?