Bug#577652: Acknowledgement (serna: Document validation failed. Validation mode is now switched from Strict to On.)

[Mathieu Malaterre]

<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE section PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd";>
<section id="demo2">
  <title>demo2 title</title>
  <para>
</para>
</section>