I usually leave patch updates and security warnings to my ZDNet blogging colleague Ryan Naraine. But when Naraine flags an out-of-band update as "super-high priority," it seems like it's worth an extra mention.
The MS07-017 update includes patches for a total of seven animated cursor (.ani) vulnerabilities, three affecting Windows Vista. In addition to Windows Vista, the update applies to Windows 2000 SP4, Windows XP SP2, Windows Server 2003, Windows Server 2003 SP1, and Windows Server 2003 SP2.
No doubt there will be other patches out on April 10, the regularly scheduled Microsoft Patch Tuesday. But Windows users shouldn't put off until then what they can (and should) patch today.