Does anyone else have trouble typing on the top line of letters without hitting 'Home' or 'Back' on the touchpad and screwing up whatever you are typing? I've lost several emails and it messes up when I try to text quickly way too often. Is there some type of smart app that can turn the touchscreen off while typing? It might be difficult for an app to determine when you intend to use the keyboard and when you want to use the touchscreen, but it is getting annoying.