Many iPhone customers had some explaining to do after they overslept to start the new year, due to a glitch in the gadget's alarm clock feature.
Users who set their iPhone alarm for a single wake-up rather than recurring use found the alarm didn't go off with the year's arrival, an Apple Inc. spokeswoman said Sunday.
A fix is in the works, and all iPhone alarms will work properly starting today, she said.
The glitch affects iPhones using Apple's latest iOS 4.0 operating system, including earlier versions of the smart phone whose users have downloaded the latest software.
It wasn't immediately clear what caused the problem, or how many iPhone users were affected. Online postings on blogs and social media sites described people being late for work, church services and other appointments Saturday and Sunday.