Ok, this time I used another 10.4.10, but it was from an Intel-based Mac, and my target computer is an iBook G4 and is Motorola-based. So, still no success. I have another Mac that is a 10.3.9 Motorola. Do you think that will work?
I know the FileVaultMaster keys are copying over correctly, because it is accepting my password to get me to the next screen to reset the user's password, but it still won't let me change it.