[kzar]

Microsoft's response is great:

Q: What fixes or patches are you putting in place to resolve this situation? This situation should remedy itself over the next 24 hours as the time flips to January 1st.

Q: What's the timeline on a fix? The issue Zune 30GB customers are experiencing today will self resolve as time changes to January 1.

Q: Why did this occur at precisely 12:01 a.m. on December 31, 2008? There is a bug in the internal clock driver causing the 30GB device to improperly handle the last day of a leap year.

Q: What is Zune doing to fix this issue? The issue should resolve itself.

http://gizmodo.com/5121822/official-fix-for-the-zune-30-fail