I recently got a Razr Maxx and have the same problem.
I have been going through apps carefully checking for nuisance notifications.
Paydirt - looked at Juice Defender log.
Among legitimate log events ...
10.28 Screen on (user present)
This is with the phone sitting on a shelf on the other side of the room. Face up or face down. Anyone else?
Any idea what app senses "user present"