When i switch from OSX to WinXP, i find i want to lower the brightness of the screen just a tad, but the jump from WinXP brightest to the next notch down is too much - is there anyone else seeing this? In OSX the 'brightness levels' are consistent, but in Winxp the top one and second-from-top are unevenly spaced, compared to the rest of the notches down...