For those of you who may not have heard, Microsoft has released an update to address the recently reported issue with processing of WMF files in Windows. You can obtain the patch through Microsoft Update, or using the Automatic Update feature of Windows XP and Windows Server 2003. You can read more about the update in the following bulletin:

http://www.microsoft.com/athome/security/update/bulletins/200601_WMF.mspx