Textpattern Resources at textpattern.org

If you want to serve your Textpattern site with the proper MIME type, you need to edit publish.php, found in the /textpattern/ directory. (written for 4.0.3)

1. Backup and open /textpattern/publish.php in a text editor
2. Search for “text/html” (lines 115 and 439)
3. Replace header("Content-type: text/html; charset=utf-8"); with Mark Pilgrim’s code

	if ( stristr($_SERVER["HTTP_ACCEPT"],"application/xhtml+xml") ) {
			header("content-type: application/xhtml+xml; charset=utf-8");
		}
		else {
			header("content-type: text/html; charset=utf-8");
		}

You can also download a new publish.php version too.