Ok, I know you may not believe me, but I have EXACTLY the same php sourcecode on 2 different pages (same directory level, both pages are not loaded at the same time) and on one page the editor displays, on the other it returns following error:
Error: uncaught exception: [Exception... "Component returned failure code: 0x80004005 (NS_ERROR_FAILURE) [nsIDOMNSHTMLDocument.execCommand]" nsresult: "0x80004005 (NS_ERROR_FAILURE)" location: "JS frame :: http://www.mywebsite.com/path/to/fck/ed ... gecko_1.js :: anonymous :: line 41" data: no]
Anyone experienced the same problem? Any suggestions perhaps?
BUG (?) for FF: