@font-face under CSS 2.1

Hello everyone,

Under CSS 2.1 validation:

@font-face { margin: 0; }

fails correctly, but with an incorrect error message:

Value Error : margin Property margin doesn't exist in CSS level 2.1
but exists in [css1, css2, css3] :  0

I think it should read something about @font-face not being in CSS
level 2.1, not the margin property. You can try with something more
sensible like "font-weight: bold;" and get the same issue.