Microsoft Knowledge Base Article 896367 contains the following summary and introduction:

SUMMARY

This article contains information about application compatibility testing that was performed for the English version of Microsoft Windows Server 2003 Service Pack 1 (SP1). The Windows Application Experience test teams tested 127 server applications on computers that were running Windows Server 2003 with SP1. This article contains two tables that summarize the results of the tests.

INTRODUCTION

This article discusses application compatibility testing that was performed for the English version of Windows Server 2003 SP1. The Windows Application Experience test teams tested 127 server applications on computers that were running Windows Server 2003 with SP1. The goal of the test teams was to verify that the server applications maintained the same level of functionality that was verified for Windows Server 2003.

This article contains two tables that summarize the results of these application compatibility tests. The first table lists the applications that passed the tests. The second table lists the applications where regressions were found. The second table contains some recommendations that you can use to possibly resolve or to work around regression issues.