When I try to rebuild the desktop, I am still getting the Finder Unexpectedly Quit error. This is happening with my iMac G3. I'm running OS 9.2.2 and 10.4.3. I followed all the directions in the Apple Help file here:
Nevermind. I figured out the solution. I ran Disk First Aid and it showed a lot of catalog problems so I just clicked Repair. When I tried to rebuild the desktop again, it worked. But if anyone else gets this error they can look at this thread.