If you ever get the error: "g.win.document is null" when using TinyMCE, email me as I have the answer. I will add notes to this blog when can. It is to do with reusing the same xhtml document and trying to reload tinymce - you need to make sure you remove it before re-using (but has to be done at the correct time). The 1blankspace jQuery default scripts will have it implemented correctly - so will be able to see there for example.