Using the has attribute selector on IE9 return the same item twice. You can see a jsfiddle reproducing this error here:

http://jsfiddle.net/gigi81/3Vzse/4/

On IE9 the alert popups twice while on chrome and firefox only once (as it was supposed to be).

Here is the code for reference to reproduce the bug:

var callCount = 0;

$(function () {

$('[data-myattribute]').each(function () {

alert('call ' + (++callCount).toString());

});

});

<form action="">

<div data-myattribute="test" />

</form>