jQuery file selector works in 1.2.6

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jQuery file selector works in 1.2.6

$('#myform :file[value!='']') works in 1.2.6, but not in 1.3.x

Selector is looking for inputs of type file with value not empty.

Test case where "uncaught exception: Syntax error, unrecognized expression: value!='']":

<div id="myform">     <form action="test-selector.php" enctype="multipart/form-data" method="post">         <div>             <input type="file" name="file" />               <input type="file" name="file" />               <input type="file" name="file" />               <input type="button" value="Send" onclick="submit_form();" />         </div>     </form> </div> <!-- <script type="text/javascript" src="js/jquery-1.2.6.js"></script> --> <script type="text/javascript" src="js/jquery-1.3.1.js"></script> <script type="text/javascript"> function submit_form() {     var files=$('#myform :file[value!=\'\']');     if (files.length>0) {         files.each(             function(i) {                 console.log(this);             }         )     }     else {         alert('Select some files please');     } } </script> Why doesn't value expression work in the current release? RE: http://dev.jquery.com/ticket/4083
UPDATE: $('#myform :file[value!=\'\']') selector works again with the release of jQuery 1.3.2