I have a new website I'm building so I figured I'd try fckeditor.  What a disaster.  Right out of the box I get "undefined is null or not an object".  I'm guessing that since the editor is your run of the mill iframe, that the javascript used by the iframe's html page is incorrectly trying to access items on its parent, aka the containing page. I blanked out the site i'm working on, but there's my error console

 I don't have the time or patience to fool with it, so I installed the latest version of freetextbox and I'm up and running.