I am having the same exact problem using Fedora 9.  Very frustrating, as I 
cannot figure out how to fix it and my backups are not working now.

I am using:

BackupPC-3.1.0-3.fc9.noarch
samba-client-3.2.7-0.23.fc9.x86_64
samba-3.2.7-0.23.fc9.x86_64

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