WordPress 4.0 Release Candidate Now Available for Testing

WordPress 4.0 RC 1 is now available for download. Helen Hou-Sandí announced the release candidate today with an update to the project schedule. The official release was targeted for the week of August 25th but will likely be arriving the following week.

“We hope to ship WordPress 4.0 next week, but we need your help to get there. If you haven’t tested 4.0 yet, there’s no time like the present,” Hou-Sandí said in the release announcement.

The easiest way to test RC1 is to put the WordPress Beta Tester plugin on a test site and start running through all the new features, many of which are highlighted on the 4.0 about page in the admin (wp-admin/about.php). If you want a more in-depth look at the new features, Hou-Sandí previewed WordPress 4.0 at a recent NYC Meetup and you can watch the video.

The good news is that plugin and theme authors still have plenty of time to test their extensions against the release candidate for compatibility. Since WordPress 4.0 adds icons to the admin plugin installer, plugin developers will want to put their custom icons in place to improve visibility among all the auto-generated ones.

Over the past month of four beta releases, WordPress 4.0 has incorporated hundreds of fixes and refinements that make it truly a joy to use. Watch for the official release to drop sometime next week.

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5 Comments


  1. “The easiest way to test RC1 is to put the WordPress Beta Tester plugin on a test site and start running through all the new features…”

    I’ve never tested a RC but I might give this one a try – thanks for explaining how Sarah

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    1. No problem Keith! If you use the plugin, make sure to select ‘Bleeding Edge Nightlies’ :) Let us know if you have any questions and thank you for commenting!

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      1. “WordPress 4.0-RC1 running Generate Pro Theme theme.”
        And that’s me all excited…

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  2. I saw on the WP 4.0 road map that WP 4.0 was supposed to come out on the 28th. Tomorrow.

    Now I see September 3.

    What delayed it?

    My birthday is on September 1. What better gift to a WordPress geek (who is currentlly wearing a green WordPress t-shirt as he is typing this comment) than have a new WP come out a few days before his birthday so he can geek out on WordPress.

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    1. What delayed it? A great community with responsible development leadership. ;)

      No one wants to release half-done or buggy software, especially when it powers over 20% of the web, and there are still a few bugs that need to be ironed out: https://core.trac.wordpress.org/report/6

      Remember, WordPress is open source, so don’t be afraid to get involved with the next development cycle. There are plenty of ways to help: http://make.wordpress.org :)

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