If my keypad is locked and the phone is in my pocket the light continously turns on and stays on for a minute or so. so normally i wear the case that keeps it locked and the light off. but i was wearing a suite so i had the phone in my pocket. my battery died within 4 hours of it being in my pocket.
They should make it like the iPhone where u need to press a button for the screen to activate. I have my backlight timeout set to 20 secs. to help reduce the time the screen stays on when it is accidently pressed.