SharePoint Portal Server 2003 Service Pack 2

Microsoft® Office SharePoint® Portal Server 2003 Service Pack 2 (SP2) contains significant security enhancements, in addition to stability and performance improvements. Some of the fixes included with SP2 have been previously released as separate updates. This service pack combines them into one update. And read this : http://support.microsoft.com/kb/887623

When you install the service pack, no user dialog box appears after the service pack is successfully installed.
•After you install the service pack, restart the server for the upgrade to complete successfully.
•The database schema is modified when you install the service pack. Therefore, any backups that were taken when the server was running the original release version of the following two programs cannot be restored to a server that has SharePoint Portal Server 2003 SP2 installed:
•Microsoft Office SharePoint Portal Server 2003
•Microsoft Office SharePoint Portal Server 2003 Service Pack 1 (SP1)
•SharePoint Portal Server 2003 supports IBM Lotus Notes R6 only if you install SharePoint Portal Server 2003 SP2.
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