samba - Aug 2011 - Cannot delete existing files in shared folder

Hi All,

We've upgraded our DC to Windows 2008 R2 from Windows 2003 recently. Since
then the users cannot modify or delete the existing files in the Samba shared
directories after the Samba server(samba 3.5.9) is joined to 2008 R2 DC from the
windows machines, but they are able to create/modify/delete the new
directories/files from the windows machines. However, when the samba server is
joined back to 2003 DC then everything is working fine. The users can do
create/modify/delete the existing files and new ones from windows machines.

Any idea would be very much appreciate.

By the way here is my settings for the samba shared directory


[sqabot]
        path = /home/sqabot
        comment = SQAbot
        read only = No
        writeable = yes
        browseable = yes
        directory mask = 0775
        create mask = 0775
        oplocks = False


Thanks in advance

Anh.