WordPress 3.5 Media and Visual/Text Buttons No Longer Work

January 21st, 2013
By: Cory Mathews

I recently updated to wordpress 3.5 and the add media button as well as the visual/text buttons stopped working when editing a page. Here is how to fix it.

Download your wp-config.php file through ftp and add the line:

define('CONCATENATE_SCRIPTS', false);

Just before the lines:

/** Sets up WordPress vars and included files. */
require_once(ABSPATH . 'wp-settings.php');

and that should fix the problem until its properly fixed in wordpress.