http://blogs.technet.com/pssmanageability/archive/2006/06/07/433698.aspxYou upgrade to SMS 2003 SP2 without extending the schema (remain at SMS SP1 schema) and now you start seeing 4918 errors from the site component manager. SMS will work without the SP 2 schema extension (with no support for FQDN) but it will log many messagesen-USCommunityServer 2.1 SP1 (Build: 61025.2)