I set "nt acl support = yes" in smb.conf [global] section, then used "testparm", it does not complain about this setting. (The parameter is no longer a global parameter). Even though the dump of the smb.conf service definitions simply ignore this setting, I guess it would be better to give some warning message about this parameter. Thanks,
service params listed in global become the defaults for all services (Unless overridden explicitly). This is by design.
database cleanup