http://www.teamrees.com/2008/04/12/windows-xp-sp3-rdp-time-bombed/

So vista sp1 and xp sp3 break the RDP client, some one figured out that by replacing 

• mstsc.exe
• mstscax.dll

from older version you got them back. I haven't applied either bug pack to my boxes yet so I dont have this problem. anybody has experiencing using this way to fix their boxes?