I remember that those "failed to change delete on close flag" errors where linked to a more general problem of file interlocks and sharing, which was fixed with the 20050201 version. There was no changes in this area since.
I suggest to check that the .TDB files situated in the SAMBA_ROOT:[VAR.LOCKS] area where reinitialized since that version (i.e. their creation dates are later than the installation of the 20050201 version). If they are not, you just have to stop Samba, delete all those [VAR.LOCKS]*.TDB files and restart Samba. Do NOT delete the SECRETS.TDB file situated in the SAMBA_ROOT:[PRIVATE] area. If the problem happens again, please tell me, and I'll make additional research. JYC PLEASE READ THIS IMPORTANT ETIQUETTE MESSAGE BEFORE POSTING: http://www.catb.org/~esr/faqs/smart-questions.html
