Weird behavior on filtered text fields with WYSIWYG / Fckeditor

I'm using Drupal 5.20 with WYSIWYG (2.0) and FckEditor (2.6.5). When I edit content (say an event) any text field set to filtered text displays the home page instead of displaying the content within the Fckeditor. Incidentally the links and menus in these embedded home pages appear to be functional. This is very weird. The actual content is there but I can not edit it because these home pages are embedded within the fields. If I submit it and view it I can see the original content.

Please see the attached image.

Any input would be very much appreciated!