My 770 also is a little dimmer on the right, and it is noticeable, especially in apps like FBReader with white background and in full screen mode. At first it bothered me, so I tried to read with a black background and with wider text margin. But then it turned out black background bothered me a great deal more After a while I got used to the screen and hardly notice anymore. I must add that all devices I owned with this type of screen - Dell Axim X5 and Tungsten T3 - had this problem, and to much larger extent than Nokia 770.