<figure> and <figcaption> (http://www.w3.org/TR/html5/grouping-content.html#the-figure-element) are simple block-elements, but rendering the following file
(download: http://phihag.de/2011/prince/figure.html)
with prince 8.0 beta 1 yields:
<!doctype html>
<figure>
<img src="http://www.princexml.com/images/plogo5.png">
<figcaption>Prince Logo</figcaption>
</figure>
(download: http://phihag.de/2011/prince/figure.html)
with prince 8.0 beta 1 yields:
prince: figure.html:2: error: Tag figure invalid
prince: figure.html:4: error: Tag figcaption invalid