I did the Mac-calibration thing, but I'm colorblind so trusting my eyes isn't very accurate, however he said (in the link) not to touch the right slider, good call! I was going mental over it, too many settings looked right.
My question is, where do you set the brightness/contrast on an Imac? I mean, I thought setting contrast and brightness was a part of the calibration, but if I tune contrast before calibration then how can it be right in the end?