I was wondering why my keyboard kept the backlight going no matter how bright the lighting in the room was....checked the prefs and the right setting was checked....then I tilted the screen back a bit more and bingo the backlight turned off on the kybrd. So whats the deal if you want your screen more upright the sensors are blocked? ...or is there a defect there? I guess that begs the question as to how far do you tilt your screen back during normal use. On mine if you have it straight up so it forms a 90 degree angle the display washes out a bit. If you tilt it back just a bit everything levels out and is perfect. Too far back and it starts to darken over. Thing is, why would having the screen more upright cause the light sensors not to work? The whole point of getting a proper viewing angle w/ a laptop (according to Apple at the big keynote) is being able to move it to an area of the room that has optimum lighting (so the glossy isn't a problem) and this includes tilting the screen so its the best viewing experience (depending on your changing environment/lighting).