Supposedly there's actually some kind of internal document from Apple acknowledging it from what the Apple Tech told me. Apple is saying it's related to the image stabilization in the camera. This is for folks who *DO NOT* have the vibrate rattle (that's a whole different deal...and Apple will fix that) but just the rattle when you tap near the camera. He even took my phone apart to look for a loose screw, etc. Everything was perfect. Just for kicks, I went around to *every single 4S in the entire store* and 100% of them had the same rattle. I believe there were ten on display (somewhere around there). Just thought someone might want to know.