Ok, until last night I was able to calibrate my early 2011 MPB to 96% sRGB using a Datacolor Spyder4 Elite system. This system works by modifying the output signal from the video card to achieve display accuracy which is in turn, tested with the supplied Datacolor Colorimeter. So far today when I tested it, the closest I can get is 70%. This is potentially a MASSIVE issue for me as I work in photography and am often called to edit photos on site, using the MBP display. Does anyone know of any changes they may have dome as far as video output profiles etc.?