I am having the same problem with the backlight being extremely dim when the phone is charging. I didn't notice it until I had to charge it in the car today and couldn't see the screen to make a call. I don't have PA installed and never have. Any ideas?
UPDATE: Found the problem... Somehow in the camera menu under "advanced settings" the setting got changed to keep backlight off. Funny thing is, I haven't even used the camera on this thing yet. Stupid friends