I've noticed a lot of colour banding (wiki) while navigating iOS 8 on the iPhone 6 Plus. Notification Centre, Weather and the lock screen keypad seem to be the worst offenders. With the default wallpaper you can actually follow a ghostly outline of the keypad while slowly sliding to return. This screenshot cross section looks much less harsh on a 27" iMac, which begs the question: is this just me, or something affecting everyone and completely normal? To test for yourself, set the default wallpaper and lookout for topographiclike formations in dark and blurred areas.