After almost 4 months, I'm getting the problem. Saw on youtube it's the small metal leads of the home button eventually compressing the lead on the iPhone's logic board so it doesn't make contact all the time. Quick question though, are most of you who go to the Genius Bar getting brand new phones or refurbs? Because at the Verizon store my dad and I have had our share of "Certified, Like-New" replacements that were crap (not Apple phones though). Plus, someone at my old school said a Genius just unwrapped a new iPhone 4 right in from of him.