I'm wondering if anyone else is having their screen brightness adjust either darker or brighter, without actually going to settings to do it. I don't know exactly what I'm pressing at the exact moment it happens...but I know it's when I tap something. I have it set in the middle to conserve battery, so it either gets really bright, or really dark!!
Either one of two things are at issue here:
1) The screen is set on auto brightness.
2) You can adjust the screen brightness (if not set to auto) by holding and dragging your finger left or right over the notification bar.
I "unchecked" the auto brightness after the first time it happened, and has been unchecked ever since. Yeah, I always have to go back to setting it back in the middle where I want it. Thanks for your input!