I got my iPhone 4 this morning. Everything looks and works great except for the proximity sensor. For some reason, the screen turns back on within 1/2 inch from face, which makes me press buttons during a call. I was on one call and pressed the speaker button twice and the 3 key before I realized something was wrong. I took my wife's 3gs, and the screen turned on 4-5 inches from my face. Wonder if it's a hardware or software thing. Any other's with the new phone have this problem?