Mail Services 1.0
This update is recommended for all users of Mac OS X 10.6.2 Server and can only be installed on systems running 10.6.2. It fixes a memory usage issue, reducing consumption and allows Mail services to be recovered using Directory Services.
Xsan 2.2.1 File System Update
The Xsan 2.2.1 File System Update is recommended for all Xsan 2.2 systems. Updates include general stability fixes, a resolution to an issue that caused QuickTime to report a playback error: "invalid public movie atom found." The Xsan 2.2.1 update also includes an Xsan uninstaller which will remove the entire Xsan application, including Xsan Admin 2.x and Xsan documentation files.
Both updates are available via Software Update or from Apple's Downloads pages.