samba - Oct 2013 - samba4 result 1306 (WERR_REVISION_MISMATCH)

Hello,

? ?I have a win2003 Server R2 as a main DC (with Windows 2003 functional level)
and a separate Samba4 (4.0.10) box as DC on the same domain.?

? ?All was more or less running fine, until I realized from running samba-tool
drs showrepl:

Default-First-Site\UBUNTUSERVER
[...]
==== INBOUND NEIGHBORS ===
CN=Schema,CN=Configuration,DC=acme,DC=loca
? ? ? ? ? ? ? ? ? ?Default-First-Site\SERVERW2K3 via RPC
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? DSA object GUID: ......................
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? Last attempt @ Tue Oct 8 .... 2013 failed,
result 1306 (WERR_REVISION_MISMATCH)
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 1853 consecutive failure(s).
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? Last success @ Thu Oct 3....................


Forcing a replication on the Win2k3 server results in the corresponding (to the
WERR_REVISION_MIS...) error message (...Indicates two revision levels are
incompatible).


Recently (probably around the Oct 3) I have instaled Active Directory Web
Services on the Windows Server and also the RSAT packages to manage from Win7
machine via the Group Policy Management Console (GPMCC). I believe the GPOs have
been updated on the server to include windows7 GPOs and so on, so perhaps I am
geting the VERSION_MISMATCH error?

Now I tried demoting the samba4 DC, but it won't work because of the same
VERSION_MISMATCH problem: using samba-tool domain demote -UAdministrator I get
a?
ERROR(<class 'samba.drs_utils.drsException'>) uncaught exception -
drsException: DRS connection to serverw2k3.acme.local failed:
'drsuapi.DsBindInfoFallback' object has no attribute
'supported_extensions'....


What can I do? Any suggestions?