15988 2012-02-14 21:09:59 +0000 box-shadow with 4 lengths yields "Parse Error [empty string]" 2012-09-03 21:12:59 +0000 1 1 1 Unclassified CSSValidator CSS 3 CSS Validator All Windows XP RESOLVED FIXED P2 normal --- 1 jean dave.null www-validator-cvs oldest_to_newest 64119 0 jean 2012-02-14 21:09:59 +0000 The following valid snippet causes the validator to complain of a Parse Error: .frozenY { box-shadow: 0px 2px 4px -2px #BBB; } Replace "-2px" with "2px" and there's still an error -- it's not the "-". Remove the "-2px" and there's no error. Therefore it's 4 lengths that are seen as illegal. The browser (Chrome, FF) renders the shadow as designed, and according to http://www.css3.info/preview/box-shadow/ this is valid CSS: box-shadow: none | <shadow> [ , <shadow> ]* <shadow> = inset? && [ <length>{2,4} && <color>? ] 73172 1 ylafon 2012-09-03 21:12:59 +0000 fixed when box-shadow was re-implemented.