Microsoft's Zune 30GB music player just wasn't ready for a leap year.

That's what owners of the devices discovered yesterday morning when they awoke to find their players frozen and unworkable.

The problem turned out to be "a bug in the internal clock driver related to the way the device handles a leap year," Microsoft Zune spokesman Matt Akers said in a posting to Zune forums on New Year's Eve. The issue does not affect all Zune players, but all models of the Zune 30GB are potentially affected, he said.

Microsoft Zune 1st generation 360

Zune is Microsoft's alternative to Apple's popular iPod devices.

The bug disabled the players on December 31, the last day of a leap year. Microsoft expects that the bug will resolve itself by today (January 1), when the device's internal clock will reset itself.

Microsoft says it will issue a bugfix for the device so that this problem won't re-occur in 2012, the next leap year.

Microsoft Zune review