Microsoft Knowledge Base Article 914962 contains the following summary and introduction:

SUMMARY

This article lists the problems that were fixed by updates after the release of Microsoft Windows Server 2003 Service Pack 1 (SP1).

INTRODUCTION

This article contains a list of Microsoft Knowledge Base (KB) articles that describe hotfixes and updates. These hotfixes and updates were released after the release of Microsoft Windows Server 2003 Service Pack 1 (SP1). This article is primarily intended to help IT Professionals and corporate help desks to support and to maintain company computer systems. For all other people who have questions about Windows Server 2003 SP1, the following Microsoft Web site may be the best location to look for answers:

         http://support.microsoft.com/ph/3198

For more information about how to obtain the latest Service Pack for Windows Server 2003, click the following article number to view the article in the Microsoft Knowledge Base:

         889100 How to obtain the latest service pack for Windows Server 2003

Note The x64-based versions of Windows Server 2003 and Microsoft Windows XP Professional x64 Edition are based on the Windows Server 2003 code tree. Service and support activities for Windows XP Professional x64 Edition use the Windows Server 2003 tree and do not use the Windows XP client tree. For more information about the x64-based versions of Windows Server 2003 and about Windows XP Professional x64 Edition, click the following article number to view the article in the Microsoft Knowledge Base:

         888733 A description of the x64-based versions of Windows Server 2003 and of Windows XP Professional x64 Edition