The MacOSX 10.2.4 Server Update delivers enhanced functionality and improved reliability for the following applications, services and technologies: AFP, SMB and NFS file services, DHCP, NetBoot, Open Directory, QuickTime Streaming Server, Sendmail and Workgroup Manager.
It prevents Xserve drives from being unmounted while locked, provides Digest authentication for WebDAV, management of Energy Saver settings, and supports NetBoot images greater than 2 GB in size. The update also provides the latest Security Updates.
More information here.
