After leaving a connected sortable without drop action, the sortable is not functional

Using jquery-1.2.6.min.js and jquery-ui from the trunk, I've constructed the following simple example:

...

jQuery('#sortable1').sortable();

jQuery('#draggable').draggable({

helper:'clone',

connectToSortable:['#sortable1']

});

...

<div id="draggable"><span>Test</span></div>

<div id="sortable1">

<p>item1</p>

<p>item2</p>

</div>

...

When dragging #draggable over #sortable1 and after end dragging without dropping the dragged item to #sortable, the sortable list is not functional any longer.