Wow... Server 2003.
Lol... that puppy is EOL. Honestly, I haven't testing on anything that old in a very long time. However, you may be able to work around this by changing the docking style.
Edit > Preferences > Options > Docking Style
Try setting either System Tray or Task Bar. Avoid the Both option. Let me know if that helps, and if it does... which one causes the exception dialog you're getting now.