[oXygen-user] CSS3

I have begun experimenting with some CSS 3 effects , particularly box rounding and box shadows. All of the example I see indicate that I have to use css properties like: border-radius : 25px; -moz-border-radius : 25px; /* Firefox 3.6 and earlier */ -moz-box-shadow : 10px 10px 5px #888888; /* Firefox 3.6 and earlier */ -webkit-box-shadow : 10px 10px 5px #888888; box-shadow : 10px 10px 5px #888888; This causes problems with the W3C CSS validator connected to Oxygen. Is there any way to validate these properties so that my CSS stylesheet does not show errors? Thanks, Mark