found problem for mine.. first try to load (yousite)/wp-includes/js/tinymce/tiny_mce_config.php
if you do not see text only funny pictures then the problem in the server php conpression, to fix this edit this tiny_mce_conig.php and change 'compress' => true to 'compress' => false
now reload (yousite)/wp-includes/js/tinymce/tiny_mce_config.php
you should see all the tinyMCE config settings if yes then proble solved.
