Actually it still does not work in the latest build on my site. Everything works fine until $editor->XHTMLOutput=true; is added to the code. As soon as that code is added I am no longer able to center paragraphs and when I edit a page, then preview, then try to go back to the editing area it does not let me.
Adam do you do the live support? Can you show me the code you are using to display the editor on the page you linked me to - xmloutput.php ?