Hi Rod,
In newer versions this is controlled by Web.config/user.config settings:
<!--
Set AutoSetContentType to false if you would rather add the meta ContentType yourself in layout.master file of your skin
if true the MetaContentControl will render it according to the ContentMimeType and ContentEncoding settings
Changed the default from application/xhtml+xml to text/html as of mojoportal version 2.3.1.3 Html 5 now seems the future rather than Xhtml
-->
<add key="AutoSetContentType" value="true" />
<add key="ContentMimeType" value="text/html" />
<add key="ContentEncoding" value="utf-8" />
Hope it helps,
Joe