I found this ugly bug when I set processEntites to false - after then FCKeditor insert
<p> </p> to start empty textarea in node/add or node editing, whatever.
if I switch off fckeditor from textarea I can see this element
The big problem is that with this empty element, I can't test required textarea fields, because with this it always pass
btw doesn't matter if processEntites = false is set in drupal fckeditor.config.js or directly in fckconfig.js