First of all, thanks for a great Editor!
I think I have discovered a bug though. When using the editor with EditCompleteDocument="True" the style in <head> is removed on postback. Also if I use a css file for EditorWysiwygMode all content in the BODY tag is removed on postbacks. This does not happen in IE. (Using build 07-02-2006)
PS! A changelog when you publish new versions would be great.