I just confirmed this with my iPod touch, and my brothers. I got mine last weekend, he got his yesterday. The 4th and 5th numbers in my serial number are 37, the 4th and 5th numbers on his serial is 38. My screen is absolutely horrible and his is great. You notice an unbelievable difference when viewing them side by side. I've talked to my local Apple Store (Not really local, an hour and a half away) and they're holding one for me right now for me to come in tonight and exchange. I'm going to call them first though and make sure the serial number is the "Week 38" serial number, or i'm not making the trip. I'm not at all confident that I'd get a good screen with a "37" serial number. Just wanting to clarify this information for anyone who is curious, and hasn't searched the forums for this different information.