WordPress 3.0 Release Candidate 1 (RC1) is available for download. A “Release Candidate” comes after the beta release and before the final launch. Also, a “Release Candidate” has all features finished and all potential issues fixed. However, there are millions using WordPress with a wide variety of configurations and hosting setups, so itâ€™s possible that they have missed something.
You can download the RC and test it out if you want, directly from wordpress.org
Some things to take in mind:
_Custom menus are finished! Yay!
_Multi-site is all set.
_There are a ton of changes, so plugin authors, please test your plugins now, so that if there is a compatibility issue, we can figure it out before the final release.
_Plugin and theme users are also encouraged to test things out. If you find problems, let your plugin/theme authors know so they can figure out the cause.
_The look of the WordPress admin has been lightened up a little bit, so you can focus more on your content.