For any of those developers or other people who managed to get their hands on 10.9.1 beta 2 (release on the 21st), I'm wondering if it resolved any of the Finder responsiveness issues or random beachballs?
been running 10.9.1 (13B35) since release, I still on occasion get the beach ball, but only for a split second
Me too, but occasionally reappear and it must be ultimately resolved in future updates. Eventually, it's a MacOsxI get a lot less beach balls.