The absolutely positioned elements (except for the second, but this is a coincidence) on http://html5.ouvaton.org/bugs3.html are not positioned correctly according to CSS 2.1 as explained in http://lists.w3.org/Archives/Public/www-style/2007Apr/0007.html.
Reported URL is broken. It isn't possible to confirm or deny existence of the reported issue. I close this report for now. Reporter, feel free to reopen this report if you provide working test case of the reported issue.