FOUND IT!! About the thumb activating the full screen keyboard! You have to double-tap with your finger! That's why to someone it was working with two fingers! it was actually registering a double-tap. Damn them, why did they not put it into the help file at least ? I flashed my tablet twice until I discovered it... I've noticed that there was no "pressure" setting near the "activate by finger tap", so.. a ring rang ( ) in my mind...