Not sure if this is a common issue, but since the 3.0.1 firmware update, I've noticed the Usage under Settings > General has been increasing even when the phone has been on sleep. I upgraded to 3.1, thinking that this update would fix this issue, but the problem still occurs. I also tried a restore from backup, still no dice. I do have MobileMe and Push is on to fetch from their servers. Is this the reason why Usage has been increasing. It currently says 7 hours of usage. I've never noticed this issue with previous firmwares. Anyone have any similar issues, better still, any fixes?