So I click 'home' and go back to home. But if I go back to an app it's where I left it. I ask Voyager how to get somewhere, then go back to home, and put my HTC Desire to sleep. In the middle of the night I hear a voice saying "Go 100 yards and turn left." OK, so voyager has an exit option in the menu. But what about other apps? They must surely be using up memory and battery power..?