[Samba] Group write permissions not set

[Cronfy]

Hello,

I have a question described in this bug report: 
https://bugzilla.samba.org/show_bug.cgi?id=5011

I am using FreeBSD 6.2 with Samba 3.0.28. I want to create share for a  group
of users. Each user must have write access to files created by other users.
To achieve this I am using 'create mask' and 'force create mode' options with
0775 value.

From my Ubuntu everything works as desired, but when Windows or SuSE client
connects to Samba and creates a file, there is no group write bit set.

Am I misunderstanding documentation and doing something wrong? Here is my
smb.conf share configuration:

[design]
   comment = Design Dept
   path = /home/deps/design
   valid users = @design
   public = no
   writable = yes
   printable = no
   create mask = 0775
   directory mask = 0775
   force create mode = 0775
   force directory mode = 0775
   security mask = 0000
   force security mode = 0777

Many thanks in advance!

-- 
Cronfy.