WordPress 3.9.1 Maintenance Release

WordPress 3.9.1 is now available for download and upgrade.

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This maintenance release fixes 34 bugs in 3.9, including numerous fixes for multisite networks, customizing widgets while previewing themes, and the updated visual editor.

It also include some improvements to the new audio/video playlists feature and some adjustments to improve performance.

For a full list of changes, consult the list of tickets and the changelog.

If you are one of the millions already running WordPress 3.9, you will be automatically upgraded to 3.9.1 within the next 24 hours with the automatic background updates.