1) -webkit-border-radius:0 6px 6px 6px doesn't work 2) developers must use uncomfortable code -webkit-border-radius:6px -webkit-border-top-left-radius:0
"-webkit-border-radius:0 6px 6px 6px" is not the proper shorthand syntax for border-radius: <http://www.w3.org/TR/css3-background/#the-border-radius>
Reopening this cause the spec now specifies the shorthand as "top-left top-right bottom-right bottom-left" (with an optional second part for vertical radii after a "/"). I think WebKit supports a previous syntax without the "/" .
Confirmed on 4 Public Beta
*** This bug has been marked as a duplicate of bug 27584 ***