The Samba-Bugzilla – Bug 4472
file_mode and dir_mode options broken when unix_extensions = no
Last modified: 2009-07-26 08:30:05 UTC
file_mode and dir_mode options of CIFS filesystem driver don't completely work
as expected for newly-created files or directories on shares that have
Fedora kernel 2.6.20 with samba patch "reset mode when client notices that ATTR_READONLY is no longer set" from 2.6.21-rc applied.
Closing as FIXED.