never thought about that... but it that happens with the two stock chargers, the iphone wall charger, the desktop dock, and with the car charger and running the GPS app.

the car charger+gps app is in fact the worst case, as it will not need touch screen usage to happen. and will happen very fast and all the time. so basically, using the gps for more then 20min, i know i will have to: press power button to turn screen off, press it again to turn screen on, type PIN, press the damn gps button i needed to press 2min ago.