I’ve fixed my CSS to pass W3C validation to improve accessibility
I had 5 errors which is not very bad. 3 of them were in Plone CSS (!). Selector .visualGhosted contained 3 tags not supprted in CSS 2.0 (only in CSS 3.0). The other 2 bugs were in my code.
I’ve fixed also some HTML markup to be valid again. My new sponsor me portlet introduced most of the errors (20). But now everything is fine again.
I’ve added proper icon on the bottom of the page to announce that important fact 🙂