Just as iPhone owners in Europe, Australia and New Zealand have already experienced, U.S. iPhone and iPod touch owners had to deal with a bug that caused their alarms to go off at the wrong time after the Daylight Saving Time change.
Users with recurring alarms that were set before the time switch in the Clock app fell victim to the bug, but one-off alarms sounded when they should.
Apple’s alarm bug hit the U.S.
Apple’s advice for users that fell victim to the bug is to delete and recreate their recurring alarms, or change the repeat setting to Never.
Apple promised a fix for the alarm bug, but so far it hasn’t appeared. Presumably it will be included in the iOS 4.2 update scheduled for release some time in November.