I have a rendering problem with my config page, which is loaded with
<form action="/administrator/index.php?option=com_config" id="application-form" method="post" name="adminForm" class="form-validate">
Other pages, such as /index.php?option=com_checkin show up perfectly.
I have compared my Joomla installation with the Joomla repository - there are no differences (just files added from my installations). So the installation seems to be ok.
I have this problem in version 3.6.1 and, after updating, also in version 3.6.5.