CSS3 Validator Warnings

[9mido]

/static/star-ratings/css/star-ratings.css produces the following CSS3 Warnings:

-moz-transition-property is an unknown vendor extension
-o-transition-property is an unknown vendor extension
-webkit-transition-property is an unknown vendor extension
-moz-transition-duration is an unknown vendor extension
-o-transition-duration is an unknown vendor extension
-webkit-transition-duration is an unknown vendor extension
-moz-transition-timing-function is an unknown vendor extension
-o-transition-timing-function is an unknown vendor extension
-webkit-transition-timing-function is an unknown vendor extension