http://www.ros.org/news/2011/02/ros-diamondback-beta-2-release.html

Thanks everyone for the helpful reports.  We've pushed a lot of stack
updates and are getting closer to our release candidate.  We
appreciate your continued help with integration, including the updates
to the installation instructions on the various Linux distributions.

FYI: Here are some remaining OS X integration tickets based on
Nicholas Butko's reports, patches welcome:

https://code.ros.org/trac/ros-pkg/ticket/4764
https://code.ros.org/trac/ros-pkg/ticket/4765
https://code.ros.org/trac/ros-pkg/ticket/4766

We still have some fixes that have not been released yet, but will be
included in the next update.

 - Ken