If you're using your iPhone or iPod touch as your primary alarm clock, it might be time to reconsider. In 2010, Apple had well-publicized difficulties with the switchover to Daylight Saving Time. Alarms failed to go off at their proper times, causing thousands of people in the Southern Hemisphere to wake up an hour early and many more thousands in the Northern Hemisphere to wake up an hour late. Now yet another bug has struck Apple's Clock app in iOS: single-use, non-repeating alarms fail to go off at all after New Year's
