samba - Feb 2005 - Unable to add new group/user to acl from windows

Hi,
i'm working on debian testing.

i installed samba 3.0.10-1, and a 2.6.8 kernel with acl support.
i create an xfs partition with mkfs.xfs.

i'm using libnss-ldap for uid/gid translation with a windows 2000 server.
(active directory patched with sfu 3.5)

I can modify, add users/group from the samba server.
ex: (test.txt owned by "admin", and "toto" is a user on AD)
$ setfacl -m u:toto:rw test.txt
$ getfacl test.txt
# file: test.txt
# owner: admin
# group: admin
user::rw-
user:toto:rw-
group::r--
mask::rw-
other::r--


from windows, toto can read and modify the file test.txt.
i tested all sorts of situations and all rights are respected by windows.

But from windows, i can only modify existing rights and delete
existing users/groups acl.
i can't add new users/groups acl on a file/folder.
i can't copy a file from windows to the samba share without its rights
beeing set to the owner user/group only.

Can someone help me with this problem ?
(i'm trying not to use winbind)

Thanks in advance for your help ;)
A.