I was having a bit of a problem with TinyMCE not loading in Zend Framework (ZF). It turns out the .htaccess file was not configured correctly. It was redirecting .js to the index bootstrap and causing the page to fail to load.
The solution was the htaccess file as so…
Options -MultiViews
RewriteEngine On
RewriteBase /website
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule !\.(txt|swf|js|ico|gif|jpg|png|css|xml)$ /website/