We lately upgraded to the latest plugin version and our TinyMCE editor ist completely messed up since then and the popups are empty (i.e. TinyMCEs HTML Source popup).
Before everything was working fine, no new plug-in has been installed since then.
Hi, I see even the tabs are completely messed up. My be some file are not loaded correctly? Try to re-install, if possible, or are you able to check if some file are not loaded when you enter the page using chrome developer tool or firebug?