A similar problem hit users of iOS devices in Australia and New Zealand in September, causing alarms to go off an hour early. Apple quickly announced that it was aware of the issue, and that it had "already developed a fix which will be available to customers in an upcoming software update." No such patch was released in all of October however, which may mean that Apple has been waiting to roll it into iOS 4.2, despite the serious problems caused by time discrepancies. The v4.2 update should arrive sometime in November, although Apple has less than a week to fix time sync before it may impact North America.
[via ipodnn]