[rdiff-backup-users] [Errno 39] Directory not empty

[Stephen Isard]

Hello,

I've just got the above error when trying to run rdiff-backup in the way 
I always do.  The directory it complains about is <backup 
directory>/home/<user>/.mozilla/firefox/i6ky0u8u.default/startupCache/ 
which is indeed not empty.  The directory 
/home/<user>/.mozilla/firefox/i6ky0u8u.default/startupCache doesn't 
exist on the volume being backed up.  I don't know what it is or was, 
but it probably got wiped out by the latest firefox upgrade.

Rdiff-backup normally copes just fine with deleted directories.  Can 
anyone suggest what the problem might be and what I should do about it?
Will --force just make things worse?

Thanks,

Stephen Isard