jQuery 1.5.1 bug: .hover + .clone(true) broken?

http://benalman.com/

by Ben Alman

HTML

<div class="a">mouseover mouseout</div>
<div class="b">hover</div>

<div id="clones"></div>

CSS

div {
    margin: 0 0 8px;
    padding: 2px;
    border: 2px solid #ddd;
}

#clones {
    padding: 8px 8px 0;
    border: 2px dashed #777;
}

.hover {
    border-color: #0a0;
    background: #afa;
}

JavaScript

$('.a').bind('mouseover mouseout', function(){
    $(this).toggleClass('hover');
});

$('.b').hover(function(){
    $(this).toggleClass('hover');
});

$('.a').clone(true).appendTo('#clones');

// Hover "event" doesn't get cloned?
$('.b').clone(true).appendTo('#clones');