The installer script wasn't broken, neither was the dmg buildbot.  I'm still not seeing how this change qualifies as one that should be allowed in after rc1.  Perhaps if there were a bug tracker issue that justified it.  Still I'll see what I can do to implement the needed changes in the installer script included in the release and in the behind the scenes build process in time.  As long as Python 2.5 can still be used for sphinx-build for now, it shouldn't be too bad.