I just upgraded from a Treo 300 and my wife has a Treo 650. Neither machines seem to have this problem. I have configured the mail button to go to the To Do List. Normally, I can scroll through the different categories by pressing the button repeatedly. However, on the Treo 600 nothing happens. I need my stylus to go to each category. I used to zip through my to do's. Now I avoid it as its become a chore. This kills the productivity of the machine for me since I live from those. Is there anything I can do?