I have had my Wii for about a week now and everything had been working fine until alst night. Every time I start a game (or do anything past the main Wii menu), the cursor on screen will flicker or jump to the edges of the screen with no movement on my part. The sensor bar is set up correctly and there is no sunlight from behind the TV or anything. The batteries in the Wii remote are perfect and I have had no problems with syncing. Anyone have some advice?