The touch screen performance of my 600 pales in comparison to my 270. From the welcome icon, I sometimes have to hit the "Xs" fifty times to get the thing to accept the input and move on. In various applications the screen response is way off calibration, for example hit a 1 on the phone keypad and get a 5, hit a 2 and get a 6 etc. Often cannot get the pulldown menus to work in touch mode. Anyone else have similar experiences? Have a solution?