[Samba] File permissions changing

[Misty Stanley-Jones]

Hi all,

This doesn't happen with UNIX so I am at a loss.  I've got a directory where 
the directory mode is 770.  All the files within it were manually set to 660 
permissions and the create mode on the share is 660.  However, when a user 
opens a file, changes it, and saves it, they become the owner (ok) and the 
mode becomes 640!  Hence, the next person comes to me and says "That file is 
read-only again!"  What is going on here?  I can understand the permissions 
reverting while someone is IN the file, but shouldn't they go back when they 
close it?

Samba 3.0.9, Linux 2.6.5.

Misty