[jQuery] Simple selector problem

[Chris]

$(document).ready(function {

    alert($("div").length);

});

----------

<div>div 1</div>
<div>div 2</div>
<div>div 3</div>

----------------

I'm using jQuery 1.3.2.  In IE, this returns 3.  In Firefox, it
returns 4.

What's going on?