I just got the iPod nano 6g replacement for my original one yesterday and maybe I'm not familiar with them because I'm not understanding the ins and outs of this thing. First problem. Why can't I turn the screen off while listening to music? When I hit the sleep button it turns the screen off and also stops my music. Second problem. I'm using the iPhone 4 headphones with it and sometimes they work and other times they don't (the inline controls). What's up with that? Third problem. When I am listening to music and I don't hit the sleep button the iPod sleeps on its own and stops my music. WTH?!?!? I just want to run and listen to music. I was jacked when I heard that the replacements were upgrades but come on. If I'm an idiot and have settings messed I'll concede it, but after going through all the menus I can't seem to find a culprit. Please help me