samba - Apr 2012 - Does the "refuse machine password change" account policy work?

I would like to use:
pdbedit -P 'refuse machine password change' -C 1
on my Solaris SPARC server running Samba 3.5.5 as a PDC to stop clients 
changing their machine passwords.

Does this actually work?
I have seen some old messages on various forums suggesting it does not 
work or does not work with Windows 7 clients.

Bug 4666 https://bugzilla.samba.org/show_bug.cgi?id=4666 implies that it 
does not work.

Regards

Nick