Hey all. Just a few minutes ago, I was playing a little Sudoku on Brain Age. As I went to fill in a number in the bottom right hand side of the touch screen, it popped down then up! Its almost like pushing in the cap of a snapple bottle..you know what i mean? It just pops in and out, in and out. Its driving me nuts. I just got this DS last saturday, and still have the receipts. Should I go and exchange it?