Trying to hit the store tomorrow.... But I can't reproduce the error consistently, but I have gotten it to fail on the touchscreen test mainly on the lower half of the screen. And every time, if I reposition my hand, it fixes itself. I do notice more dust on the screen when it has problems.
Makes me think the screen is too sensitive in certain cases (dust, fingerprints,??) , or considering this problem started after I got a very, very fine scratch near the top of the screen....i.e. a scratch on the anti shatter film is creating some problem. I'm getting a zagg screen protector but it would be nice if Sony offered a replacement film.
i always clear the dust before using it. therefore not the dust tat cause the problem.