I have a 4G that I purchased on Friday. The iPod tends to freeze after about 30 min or so of continuous use. It has frozen up on me several times now since Friday. Since I am still under 14 days of purchase what do you think my chances are of just swapping this out for a new one. I have everything that came with it still including the packaging. My only worry is when I take it into the Apple store, it may be hard for me to replicate the problem since it does not happen instantly. Do you think they will just swap it out for a new one?