Fixing Remote Desktop in Snow Leopard
After upgrading to Snow Leopard on my MacBook Pro, I only found a couple of minor issues which were easily fixed. One of them was Microsoft's Remote Desktop Client crashing at startup when I ran it. Luckily the fix was very simple-- I simply downloaded the latest version from Microsoft and installed it again. If you're having problems with Remote Desktop in Snow Leopard, give it a try!
Alternatively, you can also try downloading CoRD, an open source Remote Desktop Client and installing it. It seemed to have trouble connecting to my Windows XP workstation for whatever reason, but that doesn't mean it won't work for you of course.
CoRD is a Mac OS X remote desktop client for Microsoft Windows computers using the RDP protocol. It's easy to use, fast, and free for anyone to use or modify.