[Samba] Samba4: s3fs and oplocks

[steve]

Hi
Version 4.0.0beta3-GIT-17ad62b

If I have a libreoffice document open on a NFS Linux client and attempt 
to open the same using libreoffice or word 2003 in windows, file locking 
works.

Word 2010 however, allows me to open and edit simultaneously. Locking fails.

I can get around this by mounting the NFS share with cifs or using 
office 2003. Then locking works with all combinations. Not exactly what 
we want but OK.

How can I get this to work with Word 2010?
Cheers,
Steve