mapping an <img> element to an image role in an accessibility API is non conformaing in HTML5

Hi all,
any thoughts on this:

mapping an <img> element to an image role in an accessibility API is non
conformaing in HTML5
http://bit.ly/cpSSvC
-- 
with regards

Steve Faulkner
Technical Director - TPG Europe
Director - Web Accessibility Tools Consortium

www.paciellogroup.com | www.wat-c.org
Web Accessibility Toolbar -
http://www.paciellogroup.com/resources/wat-ie-about.html