From SambaWiki

Samba 4.0.0 alpha 13 was released on Tuesday, 21th of September 2010.

Improvements (from WHATSNEW4.txt):

  • a new build system based on WAF
  • enhancements in Samba4 winbind to provide a fairly good implementation
  • server side NT ACLs manipulation
  • dynamic DNS updates
  • registry improvements
  • new Kerberos HEIMDAL release
  • DCE/RPC code unification work
  • And much more