I get these same sort of errors repeated in my log files. They are present when I start samba and everything seems to work fine. However, after some long period of time, I won't be able to connect to the samba shares from a client. If I restart samba (/etc/init.d/samba restart), these errors are entered again at that time but I will then be able to connect. I haven't been able to find many answers yet...
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