Summary
List of Remote Desktop Server (RDS, a.k.a. Terminal server (TS)) related hotfixes for post RTM for Windows Server 2008 as of Mar. 15, 2010.

Please check http://support.microsoft.com for the latest hotfixes related to RDS.

Check out the newly released (August 13th, 2010) KB article:

2312539 Recommended Updates for the Remote Desktop Services (Terminal Services) in Windows Server 2008 and Windows Server 2008 R2

Retired:

1) 978869 Error message when you try to open a network-shared application on a client computer that is running Windows 7 or Windows Server 2008 R2: 0xc000000f

Ntdll.dll  6.1.7600.20602 

2) 978918 Error code when an application uses the CredSSP in Windows Server 2008 R2: "0x80090329"

Credssp.dll  6.1.7600.20618 
Tspkg.dll  6.1.7600.20618 
Icaapi.dll  6.1.7600.16385 
Tssecsrv.sys  6.1.7600.20618 

3) 979425 A combo box item in a RemoteApp application is updated incorrectly when you connect by using Remote Desktop Connection (RDC) 7.0

Aaclient.dll  6.1.7600.20625 
Mstsc.exe  6.1.7600.20625 
Mstscax.dll  6.1.7600.20625 
Tsgqec.dll  6.1.7600.20625 

4) 979443 You do not receive a warning message when a remote desktop connection fails from a Windows 7 or Windows Server 2008 R2-based computer

Aaclient.dll  6.1.7600.20622  (newer version on KB 979425)
Credssp.dll  6.1.7600.20622 
Mstsc.exe  6.1.7600.20622  (newer version on KB 979425)
Mstscax.dll  6.1.7600.20622  (newer version on KB 979425)
Tsgqec.dll  6.1.7600.20622  (newer version on KB 979425)
Tspkg.dll  6.1.7600.20622 

5) 979470 The "Remote Desktop Services" service cannot protect a console session from being disconnected in Windows Server 2008 R2

Termsrv.dll  6.1.7600.20621 

6) 979530 A Windows Server 2008 R2-based Remote Desktop server denies some connection requests randomly under heavy logon or logoff conditions

Regapi.dll  6.1.7600.20621 

7) 979580 Some users cannot view or print End-User-Defined Characters (EUDC) on a computer that is running Windows Server 2008 R2

Eudcsettings.exe  6.1.7600.20625 
Eudcedit.exe  6.1.7600.20625 

8) 981054 Group Policy preference settings for the "Terminal Session" item-level targeting item are not applied in Windows 7 or Windows Server 2008 R2

Gpprefcl.dll  6.1.7600.20658