2009-01-29 21:20:59: Created issue 'Remove background-clip: content-box?' nickname owned by Elika Etemad on product CSS3 Backgrounds and Borders, description 'http://lists.w3.org/Archives/Public/www-style/2009Jan/0432.html
We added a 'content-box' value to 'background-clip' to make it
parallel with 'background-origin', since in the 'background'
shorthand the 'border-box' and 'padding-box' will set both.
But I can't imagine any use for it. I can see wanting to position
images relative to the content box. But I can't see wanting to
clip background images to the content box.' non-public [Elika Etemad]