CSS Safari 6.0.2 Artifacts

HTML

<div id="test"></div>

CSS

#test{
    width: 200px;
    height: 200px;

    border-radius: 50%;
    background-color: blue;
    box-shadow: inset -3px 0 0 yellow;
}


body{
    margin: 25%;
    height: 200%;
    background-color: gray;
}