jQuery UI #7084 Draggable with parent containment and margin

http://bugs.jqueryui.com/ticket/7084

HTML

<script src="http://code.jquery.com/jquery-1.5.2rc1.js"></script>
<script src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.11/jquery-ui.min.js"></script>
<!--<script src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.10/jquery-ui.min.js"></script>-->

<div id="slider">
    <div id="bar"></div>
</div>

CSS

#slider {
    width: 300px;
    height: 100px;
    border: 1px solid red;
    margin-left: 20px;
}

#bar {
    background: #999;
    height: 5px;
    cursor: pointer;
    width: 5px;
}

JavaScript

$('#bar').draggable({
		axis: "x",
    containment: 'parent'
});