samba - Jan 2004 - 3.0.1 error: kernel: smb_proc_readdir_long: error=-512, breaking

I'm doing further tests, in relation to my post titled "win 2k3 / XP
Pro
to Samba 3.0.1 open failed, result=-512".

In doing another initial sync, that is to an empty directory using 
rsync, I got this error in my logs:

kernel: smb_proc_readdir_long: error=-512, breaking

Any ideas what this may mean, and what I can do?