I have my X sitting on my desk which is perfectly flat. The X sitting on my desk wobbles, the top left and bottom right corner come up off the table slightly and I can sit there and teeter totter the phone up and down between those corners. I've never noted this about an iPhone before, they have always laid perfectly flat. I wonder if I just got a bad phone, will have to drop by the apple store to find out. Yeah it's not a big deal, but just bothers the heck out of me when I'm typing a message while it's laying flat.