Pardon? I re-read the document a few times and it seems to me that people that update right away will be the most affected -bummer!
This issue does not affect any Windows 2000 Hotfixes that are available from the Microsoft Download Center or on the Windows Update Web site, including Windows 2000 Security Updates. This issue affects only a small number of post-Service Pack 3 (SP3 ) hotfixes, created between April 2, 2002 and July 29, 2002, and which are available only from Microsoft Product Support Services. These hotfixes are listed in the "Resolution" and "More Information" sections of this article.
If this issue affects your system, the Windows 2000 SP3 Installer will pause during Setup and alert you to the fixes that are in conflict. If you do not receive this alert message, you do not have to worry about this issue. If you choose to continue Setup without taking action, you can still finish the Service Pack 3 (SP3) installation and then apply the updated fix afterward.
Download: Windows 2000 SP3
Download: Windows 2000 SP3 Deployment Tools
Download: Windows 2000 SP3 Support Tools