Apple seeds OS X 10.9.3 beta: Developers, come get you some
Apple has posted the new beta of OS X 10.9.3, build 13D45a for registered Mac developers to test. This is pre-release software covered by a non-disclosure agreement, so we're not going to post the details of the new build, but rest assured that major bugs and gripes will be addressed.
We have no idea when we'll see the update for Mavericks, but we expect it soon. If you're a developer in good standing, high-tail it to the Apple Developer Center and start poking around.