We've just put beta 4 into the members area. This is strictly a bug fix release. We fixed a large number of the bugs that have been hanging around for awhile, so we're inching closer to our final release.
This will require a manual upgrade. There are no database alterations so it's fairly straightforward. You'll want to upload everything, except for the following directories:
/includes
/cache_builders/custom (You do want to upload all of the .php files in the cache_builders directory, just not anything in the custom directory within)
/styles
/install
