PDF export does not put each Confluence page on a new PDF page

There is code in the PDF export plugin that tries to put a pagebreak between pages. But it doesn't work.
The CSS is

h1.pagetitle 
{
    page-break-before: always;
}

But there is no h1 with class pagetitle. Instead there's a div that has no purpose I am yet to understand:

<div class="pagetitle" id="$pageTitle">
    	<h$pageLevel>$pageTitle</h$pageLevel>
    	$content
</div>