A bug in the iPhone's operating system resulted in alarms going off an hour late as the UK's clocks went back.

The iPhone's regular clock can handle the change and automatically steps back one hour. However, the alarm goes off one hour late. People who set the alarm for 7am found that it didn't actuall sounds until 8am.

iPhone users seem to have managed fine, with lots of short showers and quick breakfasts: "The iPhone gave me a nice sleep-in. Luckily a friend called me four minutes before the lecture started, and I managed to get there reasonably on time," said one user on MacWorld Swedish site.

The change from daylight saving time happened early Sunday.

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

Apple did not say when the issue will be fixed.

See also: Apple sues Motorola over mobile phone patents