I just saw this a message in my inbox on the patch. I have copied out part of the message. I have not downloaded or tested the patch but I plan on looking at it later tonight or tomorrow.

Important Information for Thursday 5 January 2006

Microsoft announced that it would release a security update to help
protect customers from exploitations of a vulnerability in the Windows
Meta File (WMF) area of code in the Windows operating system on Tuesday,
January 2, 2006, in response to malicious and criminal attacks on
computer users that were discovered last week.
 
Microsoft will release the update today on Thursday, January 5, 2006,
earlier than planned.

Microsoft originally planned to release the update on Tuesday, January
10, 2006 as part of its regular monthly release of security bulletins,
once testing for quality and application compatibility was complete.
However, testing has been completed earlier than anticipated and the
update is ready for release.

In addition, Microsoft is releasing the update early in response to
strong customer sentiment that the release should be made available as
soon as possible.

Microsoft's monitoring of attack data continues to indicate that the
attacks are limited and are being mitigated both by Microsoft's efforts
to shut down malicious Web sites and with up-to-date signatures form
anti-virus companies.

The security update will be available at 2:00 pm PT as MS06-001.

Enterprise customers who are using Windows Server Update Services will
receive the update automatically.  In additional the update is supported
Microsoft Baseline Security Analyzer 2.0, Systems Management Server, and
Software Update Services.  Enterprise customers can also manually
download the update from the Download Center.