Becuase of battery and speaker problems I took back my D4 and got a new one. And now there is a new problem. Every time I touch the screen, a little round area in the middle of the screen shows...it's hard to explain but its liek a mushy little movement in the screen. kiund of like pushing the screen of a calculator when it is off. And anywhere I touch on the screen that happens in that same spot in the middle. And if i touch that spot in the middle a bigger version shows. Definitely seems like I am going to need to go get a third one tomorrow unless anyone has any insight on this or how to try recalibrating the screen.