[jQuery] animate() with em fontsize units

[Andrew Ma]

Hello,
I have a chunk of code that animates fontsize changes with the units
set to em. The animation is a bit wacky. Am I doing something wrong or
have I found a bug?

    <style>
    #test {
        font-size:1.2em;
    }
    </style>
    <div id="test" href="http://www.google.com";>Test</div>
    <script type="text/javascript">
    $('#test').mouseover(function() {
        $('#test').animate({fontSize:'1.8em'},200);
    });

    $('#test').mouseout(function() {
        $('#test').animate({fontSize:'1.2em'},200);
    });
    </script>