Have you determined a maximum number of characters allowed in FCKEditor?
I seem to have hit a wall. It will display the text to be edited, but changes don't get posted back to the server – only the original text gets posted back to the server. I am assuming that the changed text is not copied back to the hidden input field.
This problem only occurs with large amounts of text. Smaller lengths of text work just fine.
I realize this may be more suited for a bug report to the FCKEditor project, but the stack overflow community seems really responsive and willing to help.
Edit: I should clarify what I mean by large. A text field with 60,000 characters is giving us problems.