So my iPhone 4 is about 8 months old now. Recently, the home button has stopped responding randomly. For example: I would double click the Home button, and nothing happens. I rapid-fire click the Home button, and nothing happens. I click the Home button once, and the multitasking bar opens up. I double click the Home button, and the current app closes and Spotlight opens up. Is this an OS bug, or is it hardware? I'm inclined to think it's hardware. I would have gone to the Apple Store, but I've already gone 8 months ago because my FIRST iPhone had a defunct mike. I don't want to wear out my welcome. Anyone else have this problem? If so, what did you do to get it fixed?