Respuesta a "Rattling noise inside phone?"I have this same problem, but I don't notice anything defective other than that, so I, personally, wouldn't be worried about it.
Respuesta a "Cracked Glass Covering the Camera"I found out that the camera glass is a part of the back cover. I also found a part on eBay to fix. Very disappointing and annoying problem, indeed. [EBay Link]