This is kind of silly, but I was wondering if the black plastic section on the back bottom of your iPhone squeaks or clicks when you lightly squeeze the sides. I found this to be the case on my 8GB iPhone, but not my wife's 8GB (hers feels solid). I exchanged mine at the Apple store for a brand new one, but found this one "gives" a little on the sides as well. I showed the employees that the ones on display in the store don't do that (the plastic is firm), and they claimed it's because the display models are 4GB versions. I know it's a little anal of me, but my feeling is, a $600 piece of advanced technology should feel consistently solid. I'm very curious to hear other people's thoughts.