title: wkhtmltopdf css sizes in cm/mm
body: <p>I use wkhtmltopdf to produce A4 sized PDFs. When I create a <code>&lt;div&gt;</code> tag and set its style to <code>height: 297mm; width: 210mm</code> (which is the defined size of A4), set wkhtmltopdf's margin settings to 0 (<code>wkhtmltopdf -B 0 -T 0 -L 0 -R 0 ...</code>) and give the <code>&lt;div&gt;</code> a red background, I can see a thin white line at the bottom of the page, i.e. the <code>&lt;div&gt;</code> is not filling the page completely. This is happening consistently with 0.11.0 rc1 (the latest version) on Debian and with 0.10.0 rc2 on Mac OS X.</p>
  
  <p>Has anyone else seen this? Is this a known problem, or is there a workaround?</p>