It would be nice if the HTML formatting in the HTMLEditorExtender was the same as in the old HTMLEditor. The HTMLEditor is using span tags with styles instead of font tags (font tags are deprecated by W3C). And the HTMLEditor format the HTML as XHTML.
Comments: Created a feature request at http://ajaxcontroltoolkit.codeplex.com/workitem/27159
Comments: Created a feature request at http://ajaxcontroltoolkit.codeplex.com/workitem/27159