You can quickly fix this one as it may be related to wordpress not being able to load jquery (I had this issue).
Just add this to your wp-config file : define('SCRIPT_DEBUG', true);
it will fix the editor along with the menus and other things I have not discovered. It may slow down the admin side of your site, but your users would be happy.
Also Ihave found Premise and Opt-In Skin errors are also fixed this way.