Additional Information
Mac OS X Server v10.6.5 (build 10H575), released on November 15, 2010, includes security content described in this article. If you installed Mac OS X Server v10.6.5 (build 10H574), released on November 10, 2010, you should reinstall the Mac OS X Server v10.6.5 Update.
Important: If you downloaded the standalone installer of Mac OS X Server v10.6.5 (build 10H574) prior to November 15, 2010, do not install it on a system running Mac OS X Server v10.6.5 (build 10H575), as that would revert the server to build 10H574.
You can tell which build of Mac OS X Server v10.6.5 you are running by choosing About this Mac from the Apple menu. Click the word "Version" in the About This Mac window to see the build number. If you are running Mac OS X Server build 10H574, use Software Update or the Mac OS X Server v10.6.5 Update standalone installer to update to build 10H575.