I have my magic trackpad below my keyboard and it's great most of the time, but occasionally I hit the edges and end up clicking somewhere on the screen where I didn't want to click.
I tried putting a piece of masking tape, then a piece of plastic down the sides but it still picks up my hand through those.
Since I can't figure out a way to physically cover the edges so input is not read, is there some way with software / preferences to have the trackpad ignore movements at the very edges?