In the HTML editor in the Manage Topics admin panel it has a "Select Doctype" drop down box and a "Validate XHTML" button. When you hit Validate button it tells you everything is valid when the markup is not, valid XHTML. Biggest problem being uppercase HTML tags.
If it possible to get this control to output valid XHTML? It seems to always make the tags uppercase, even when you directly edit the HTML and type it in lowercase. I would like to set my doctype to XHTML in expressTemplate.ascx but this editor forcing me to use HTML 4.01 instead.