IN YOUR correspondent’s slumbering household in Tokyo this morning, three iPhone alarm clocks failed to go off—all set early because two visiting friends needed to catch the Shinkansen (bullet train) to Kyoto. They still caught the train. But how many of last night’s iPhone-dependent revellers across the world will have a similar panic attack as they oversleep this morning with planes, trains and buses to catch. Some bloggers are speculating that this is the result of a Y2K-style bug that seems to have caught Apple by surprise at the dawn of 2011.