The beginnings of an a11y checker built in YUI 3. This initial commit is a set of four methods for identifying common accessibility errors.
Fixed error with tooltips lingering after errors are cleared
The pull request process for Gallery is through the gallery module page on yuilibrary.com. You might not see a CDN request button because you haven't signed the CLA (http://bit.ly/yuicla2).
Ping me if you have any questions.