This is an archived snapshot of W3C's public bugzilla bug tracker, decommissioned in April 2019. Please see the home page for more details.
If you paste these in the text area: border-width: 0 0 1px 0; border-width: 1px 0 0 0; border-width: 1px 0 0 1px; You get back these as valid css: border-width : 0 0 1px; border-width : 1px 0 0; border-width : 1px 0 0 1px; The first two apparently are equivalent to the original, but I think it is bad for usability to rewrite the user's css in this way. Trying to remember the "12:00 3:00 6:00 9:00" versus "12:00/6:00 3:00/9:00" orientation is challenging enough without getting back 3 settings.
Created attachment 420 [details] 4 values for border property adding test case identical to the one reported in http://www.w3.org/Bugs/Public/show_bug.cgi?id=2446#c0 the "source display" after validation should have 4 values for each case, not just 3.
Fixed in CVS by Jean-Guilhem Rouel. Testable at http://qa-dev.w3.org:8001/css-validator/validator?uri=http%3A%2F%2Fwww.w3.org%2FBugs%2FPublic%2Fattachment.cgi%3Fid%3D420 Will be in the production service shortly.