I've got the screen brightness turned down all the way because I like to think it makes the battery last longer...
Anyway, I'd say about 30%-40% of the time I turn my phone on, the screen pops up at FULL brightness. I have to hit the power button to turn the display off then bring it back on to get the "right" brightness level.
Not a HUGE problem, but sounds like a bug to me. Anyone else ever experience this?