jQuery Forum

I am getting "Unspecified error." from IE9 users.  The error points to line 4651 in the uncompressed v1.7.2 jquery.js file. 

1.       focus: function( elem ) {
2.             return elem === elem.ownerDocument.activeElement;
3.         }

The call appears to come from the highlighted line in this code:

1.   var shippingDetailsFocused;
2.   $(document).ready(function(){
3.     shippingDetailsFocused = $(':text:focus').first();
4.     $(':text').focus(function(){
5.       shippingDetailsFocused = $(this);
6.     });
7.   });

I can't reproduce the error myself, but we get 10 - 15 of these every day via our javascript error logging.

Any ideas what is causing this?  So far I have only seen it from IE9 users.