Oh man, I’m so sorry you’re having this issue too. What a total pain in the arse. What I finally ended up doing was deleting all of my plugins, then re-installing them one by one. I *think* my issue was some sort of compatibility issue between CKEditor and another text editor plugin that I had installed. All I know is that after reinstalling the majority of my plugins and dumping a few others, my issue resolved itself.
Fingers crossed for you.
