Applies to
Windows Server 2003 Service Pack 2
Windows Server 2003 SP2
W2K3 Service Pack 2
W2K3 SP2
Windows Server 2003 Service Pack 2 R2
Windows Server 2003 SP2 R2
W2K3 Service Pack 2 R2
W2K3 SP2 R2

For the latest versions of the hotfixes search http://support.microsoft.com/

Note 1: Regular support of Windows Server 2003 with Service Pack 2 ended in 2010. So there aren’t going to be any new hotfixes except for the Security hotfixes.

Note 2: These will not be included in any "Service Packs", since there are no plans for a "Service Pack 3" for Windows Server 2003.

Note 3: As any hotfix, you should test in your Test or Quality Assurance environment before being rolled out.

List of Perfmon related hotfixes post Service Pack 2 for Windows Server 2003 as of Mar, 2012:

977440 There is a decrease in performance for a real-time application on a computer that is running Windows Server 2003 SP2 if the Performance Monitor or the Logman tool collects lots of performance counter
http://support.microsoft.com/?id=977440

Update(s):
Smlogsvc.exe 5.2.3790.4618
Wsmlogsvc.exe 5.2.3790.4618

969701 The memory usage of the Svchost.exe process keeps increasing when other users remotely collect performance data about the Windows Server 2003-based computer
http://support.microsoft.com/?id=969701

Update(s):
Regsvc.dll 5.2.3790.3324
Wregsvc.dll 5.2.3790.3324

942955FIX: No performance objects and no counters are listed in System Monitor when you enable the ODBC performance monitor counters on a computer that is running a x64-based version of Windows Server 2003
http://support.microsoft.com/?id=942955

Update(s):
Odbc32.dll 3.526.4171.0
Wodbc32.dll 3.526.4171.0

941084 When you use a WMI script to query the Win32_PerfFormattedData_NTDS_NTDS class on a Windows Server 2003-based domain controller, the script returns a 0x80041010 error
http://support.microsoft.com/?id=941084

Update(s):
Ntdsa.dll 5.2.3790.4329
Ntdsctr.h
Ntdsctrs.ini
Ntdsperf.dll 5.2.3790.4329
Wntdsa.dll 5.2.3790.4329
Wntdsperf.dll 5.2.3790.4329

939667 On a Windows Server 2003-based domain controller, the "Authentications in Error" performance counter of the FileReplicaSet performance object and of the FileReplicaConn performance object display incorrect values
http://support.microsoft.com/?id=939667

Update(s):
Ntfrs.exe 5.2.3790.4107
Wntfrs.exe 5.2.3790.4107

935987 The "File Control Byte/sec" counter of the System performance object displays values that are larger than expected on a computer that is running a 64-bit version of Windows Server 2003
http://support.microsoft.com/?id=935987

Update(s):
Termdd.sys 5.2.3790.4061

934615 FIX: You can only view performance counters for 256 publishing points on a Windows Media Services 9 Series server
http://support.microsoft.com/?id=934615

Update(s):
Wmsperf.dll 9.1.1.3843

928576 Netlogon Performance Counters for Server 2003
http://support.microsoft.com/?id=928576

Update(s):
Netapi32.dll
Netlogon.dll
Nlctrs.h
Nlperf.dll
Nlperf.ini