So I've noticed the last couple days that my N900 like to constantly dim and brighten the backlight, as well as turn the keyboard backlighting on and off. There aren't any settings for this as far as I've seen. I've noticed it most while web browsing (white backgrounds, reading a static page).

It seems to be triggered (not quite perfectly repeatable, but since there are no settings I have no idea how long it should normally take) by covering the left side of the device. Since everything is landscape oriented, you're holding it with with 2 hands so you don't drop it, so your left hand/thumb is always covering the left side of the device.

Anyone else run into this? Any way to adjust/turn off this setting?

Thanks