WordPress have just released their third release candidate version WordPress 3.4 Release Candidate 3 to the public for download and testing purposes. They have fixed several issues in this release including the live preview function, custom headers and backgrounds. WordPress have also confirmed that this will be the last RC update release befor we see a full final WordPress 3.4 release in the coming days.
There are no remaining issues, and we plan to release 3.4 in the coming days. But if you think you’ve found a bug, you can post to the Alpha/Beta area in the support forums, or file a bug report on WordPress Trac.
To test WordPress 3.4, try the WordPress Beta Tester plugin (you’ll want “bleeding edge nightlies”). Or you can download the release candidate here (zip). Be sure to visit → About for an updated list of features and under-the-hood changes. As a reminder: We’ve published some resources on the development blog to help plugin and theme developers prepare.