[herkalees]

If it matters at this point, here is how I did it in the past, but it relies on javascript:

<script type="text/javascript">
    var detect = navigator.userAgent.toLowerCase();
    if (checkIt('safari')){
        document.write('<style type="text/css">#submit-button {margin-top:8px;}</style>');
    }
    function checkIt(string){
        var place = detect.indexOf(string) + 1;
        return place;
    }
</script>

You could, of course, replace the style element with a link to a safari-only style sheet.