Macarians, I have a 13" 2011 MBA, love it yardayarda .. But I find the backlight on the keyboard weird. First, I have set it to Zero, Off, no bars via the keyboard. The machine goes to screen saver, and instantly turns them onto full again, I unlock the screen, and hit the keyboard light down and it will not turn off, I need to go up one bar, then backdown to zero for it to to turn off ?! Every setting I can find seems to be set for it to be turned off, it happens on Battery or power, Power setting modes are all fine. Is this the norm, or am I going to have to drundle down to my apple store and get it looked at ? Thanks for your time! C.