I use my PowerBook in the dark, and the keyboard backlight does come in handy, especially for the function keys. However, the backlight seems to have a mind of its own. I press F10 (the button to turn the backlight up) and the keyboard will decide how long it wants to stay lit for, then the backlight will turn off on its own. Yes, I have checked in the Keyboard and Mouse section of System Preferences, and I have it set to never turn off. Right now it is behaving, but a few minutes ago I had to turn it on a few times. Any ideas?