Hi this is a FYI post.

I have had this problem 3 times and its kinda anoying.

See also this thread http://talk.maemo.org/showthread.php?t=26223
It might be others.

Suddenly the phone touch screen response is erratic, feels like a "bug" no response, bad response, wrong and erratic response with fingers and stylus. I have been fooled by this 3 times. It’s the screen protector, I have no explanation, but it is. Why I know. I have reflashed and reinstalled the phone these 3 times, because nothing about the screen protector seemed wrong. After reflash, reinstall of apps and backups, same problem. Change screen protector, problem solved. I have also tried to recalibrate screen while this problem persisted. Felt like it helped for a few minutes, but that’s it.

I hope this might help someone.