I found that the name of users added to the system had a <div> tag in front of the name.Therefor usernames didn't show up in the rendered html in emails and user overview page.I removed the sanitize function when User: is called. (line 175 in class.user.php )# original: 'name' => Format:(Format:($name, false))." X ".$name,# changed to: 'name' => Format:($name),(version 1.9.9)