My 4 month old iPhone 4 has a broken power/sleep button. The button was fine one moment then when I pushed the button to put the phone to sleep 5 seconds later I noticed that it had sunken in. There is no "spring" or "snap" when I push the button anymore. If I push really hard it will activate but I am afraid it will worsen to the point where it is no longer functional. Has anyone else experienced this issue? I searched Apple's support forums and found only a couple of incidents of a failed power/ sleep button on an iphone 4 though the problem seems rather prevalent on older 3G(S) phones. I plan on going to an Apple Store to have it checked out. Hopefully they will replace or fix it. My 4 month old iphone 4 is pristine with no scratches or nicks, has been in a case or protective skin since day one and has never been dropped. This leads me to believe that there perhaps is a flaw or at least a bad batch of power/sleep buttons on iPhone 4. I still have a 2.5 year old iphone 3G that has been dropped over a dozen times, looks like crap cosmetically but still works perfectly fine. I must say my faith in the Fit and Finish of Apple products has been shaken recently. My MBP bottom housing got warped and bent at the ethernet connector due to the weakness of the unibody frame in that area. This happened from a 1 foot drop while the MBP was in a neoprene case. This of course was my fault, but with my now broken iPhone 4 button I am beginning to wonder if Apple should do better stress testing or perhaps engineering their products to take a little more real world abuse.