I do Folding@Home (with a different group, sorry), and I recently discovered that I had a unit that wouldn't send for two weeks straight. Researching, I discovered that the version I was using (5.03 or something) was pretty outdated. Apparently 6.20 came out in like August 2008, and the newest version 6.23 came out in December. I don't really know if having the old version was responsible for my problems or not, but I figure if they have an updated version, they probably would prefer that I use it. If you're not sure what version of F@H you're using, you can right click the system tray icon and choose Status -> Log File, or search your computer for a file called FAHlog.txt. When you open that file, it will tell the version you're using somewhere near the top.
For the curious, there are other goofy versions of Google that you can use. Click "Language Tools" on the right side of the www.google.com homepage, and scroll down to the list at the bottom of the page.