Yesterday when I picked up my iphone4 there was an extremely noticeable string of yellow blotches at the bottom of the screen (very visible when using ibooks). This morning I turned on the phone and the bottom of the screen is now nice and white - no traces of yellow left. Looks like the explanation of the bonding agent needing some additional time to cure were correct. I'd post pics, but the screen looks normal I'm loving this phone - camera is super fast, good in low light, gps is fast, and the overall feel of the phone is incredibly snappy. A good upgrade from my 3gs. L.