I posted this on the WP 4.0 beta forum, and they suggested I let the plugin developer know, which is what I am doing now. If you prefer that I post these issues elsewhere or not at all, please let me know. So, I'm running the latest WP beta software on site with version 4.0.2 of TinyMCE Advanced plugin. When I go to visual editor, I still see the buttons, but the Editor Menu that used to display just above the buttons no longer appears. FYI, the site where I am running the WP 4.0 software is an exact duplicate of a site where I am running WP 3.9.1. The only difference I have encountered with your plugin on the two sites is the Editor Menu issue.