ran into the same problem, simple solution:
// touch all input values
$('input:text').each(function() {
$(this).attr('value', $(this).val());
});
var clones = $('input:text').clone();
the trick is that this will change the actual 'value' attribute in the DOM tree, otherwise the data you enter 'on-the-fly' only exists in the DOM 'state'
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