The 0.7b branch has some relatively major internal changes to the
build tools. They now run on an abstraction layer, called
"Narwhal" (
http://github.com/tlrobinson/narwhal), that will make it
easier to eventually move them from Rhino to a faster interpreter.
This shouldn't make much of a difference to you, except you now need
to run "rake submodules" after you checkout, before building (I'm
going to try to better integrate this with the build process, so it's
automatic).
You may want to delete your existing build directory and/or install
directory (/usr/local/share/objj) first.
Try it out and let me know if you have any problems. I'd like to make
sure it works well on OS X and various Linux distros before we hit 0.7
(soon!)
-Tom