Until recently role="search" on a section element passed HTML5 validation. Without any change to the HTML markup, all of a sudden pages that passed HTML5 validation now throw the following error: 

Error Line 62, Column 23: Bad value search for attribute role on element section.
<section role="search"><div id="wet-srchbx"><h2>Search</h2>

(used http://wet-boew.github.io/wet-boew/demos/index-eng.html for this example)

Looking at the W3C HTML5 candidate recommendation, the latest W3C HTML5.1 draft and even the WHATWG HTML living standard they all indicate that role="search" is acceptable on a section element. Here are the relevant sections in each of those documents:

HTML5: http://www.w3.org/TR/html5/dom.html#sec-implicit-aria-semantics
HTML5.1: http://www.w3.org/html/wg/drafts/html/master/dom.html#sec-implicit-aria-semantics
HTML living standard: http://www.whatwg.org/specs/web-apps/current-work/multipage/elements.html#wai-aria

Please correct the validator so it no longer incorrectly identifies role="search" on a section element as being a validation error.

Note that this bug also affects the Nu Markup validator and Validator.nu.