20787 2013-01-27 12:22:58 +0000 vendor-prefixed pseudo-element/pseudo-class should cause Warnings instead of Errors by default 2013-02-13 15:05:47 +0000 1 1 1 Unclassified CSSValidator CSS 3 CSS Validator PC All RESOLVED FIXED https://twitter.com/necolas/status/295370972326940674 P2 normal --- 1 mike dave.null mathias paul.irish www-validator-cvs oldest_to_newest 82215 0 mike 2013-01-27 12:22:58 +0000 see https://twitter.com/necolas/status/295370972326940674 [[Email. Every. Single. Day. "Dear Nicolas, normalize.css does not pass W3C CSS validation. Please fix this."]] The validator emits several "Unknown pseudo-element or pseudo-class" errors normalize.css and several "unknown vendor extension" for some vendor-prefixed properties. So it seems like the current default is to report warnings instead of errors for vendor-prefixed properties. I suggest making that also be the default behavior for vendor-prefixed pseudo-elements and pseudo-classes; that is, report warnings by default for those too, instead of errors. 83107 1 ylafon 2013-02-13 15:05:47 +0000 Fixed, sorry for the lack of daily emails as a result of that fix ;)