Weird jQuery / Javascript conflict

Please have a look at my website. At the moment just “available” in Google Chrome and iPhone/iPad.

I use the plugin “PBD AJAX Load Posts” for loading extra posts on the frontpage.

I use the plugin “Custom Posts Per Page” to set how many posts I want to show standard and how many to add when clicking the more button.

I use below piece javascript to fade in/out an hover over the posts.

<script type="text/javascript">
<!--
$(document).ready(function() {
    $(".thumb").hover(function() {
        $(this).children(".hover").fadeIn();
    }, function() {
        $(this).children(".hover").fadeOut();
    });
});
-->
</script>

As you can see the hover works fine on the standard loaded posts, but not on the extra loaded posts? Anyone any idea how this could be possible?

Thanks!