there was severe touch screen problem with my n900 and i was scared that my days of nokia n900 were over but then i came across this thread and found out that removing the screen protector could do the job and it did . Moisture between screen protector and digitizer was the main cause. Thanx to this wonderful community and this thread and all the people sharing their experiences. Saved myself 2gs but now i have to buy a good screen protector.