I jus got my iphone 5, not only battery draining fast after setting all my possible battery draining app off, when i was entering my password in itune, i encountered what u had once jus now. I was so horrified and stared at it quite awhile, it was white running/flickering horizontal lines at the keyboard. So i tried to snapshot to show u all but the picture didnt able to capture it at all. I guess its software problem as it couldnt show in picture. Or problem with the internal part of phone? The line was jus flickering on surface ? Urgh! Why like that!! I hope its ios problem because its hassle to change and etc.