[jQuery] jQuery in IE7

Hello!
I was trying to start learning jQuery, but faced a problem: ready
event doesn't work in IE7, but works fine in Firefox and Safari.
...
<script type="text/javascript" src="./jquery-1.2.2.js"></script>
<script type="text/javascript">
$(document).ready( function() {
alert ( "test" );
});
...
I tried different versions: 1.2.2,1.2.3, regular, packed, minified. I
guess this is a bug.