I am only making this post for the few owners who have the combination of a 2012 MBA 13" LG screen & LG IPS234 monitor. I have used both an hdmi and dvi cable from the MBA to the LG and the DVI outperforms the HDMI cable. The hdmi whites washout badly but the dvi connection is perfect. Using the Spyder4Pro calibration, the LG monitor has a much better calibrated screen. For those owners who have an uncalibrated LG IPS234 screen on OSX 10.8.3, I'll make my .icc profile available via message request.