Alan.Coopersmith@Sun.COM said on the XFree86.org forum list:
X.org is not really "forking" - it's simply that as has been done several times in the past since XFree86 originally forked from X.org, X.org was bringing the latest XFree86 changes back into the X.org tree. This was being done on a new public CVS tree on freedesktop.org that was pulling over automatically from the XFree86 CVS. The "fork" was simply that the cron jobs doing so were stopped when the license changed until X.org has a chance to decide whether or not code under the new license should be
incorporated. I'm sure the XFree86 Board expected everyone using their code to stop and take a look at the new license before pulling in code using it - if nothing else, to understand what the new requirements were and determine if they were meeting them or wanted to meet them.