Apple has released a support document highlighting the problem of iPhone alarms setting of one hour late, as the U.S. switched from Daylight Savings Time.
In case you missed it, the Apple Knowledge Base article, iOS 4.1: Repeating alarms may trigger incorrectly before or after DST change, notes that in some regions, repeating alarms created in the Clock app may work incorrectly. The problem arises shortly before or after the daylight saving time (DST) change.
To resolve this behavior for existing alarms, Apple recommends users set the repeat interval to Never. Users will also need to reset these alarms for each day you need them. After November 7, 2010, the document says, you're able to set your alarms to repeat again.
Apple adds the support document will be updated as more information becomes available.
Apple users suffered similar problems across Europe last weekend with many waking late for work on Monday due to the time change and the end of BST in the UK.
This isn't the first time that the switch has caused problems for iPhone users. At the end of September and the beginning of October, the change caused alarms in New Zealand and Australia to go off one hour early.
Apple devices affected by the bug are the second-, third- and fourth-generation iPod touch, iPhone 3G, iPhone 4, and iPhone 3GS.
This story, "Apple offers advice on iPhone alarm bug" was originally published by Macworld U.K..