Cross Server Autocomplete Not Working in IE 8

Hi,

$( "#city" ).autocomplete({

source: function( req, response ) {

url=AUTOCOMPLETE_URL;

url=url+"&q="+req.term

$.ajax({

url: url,

dataType: "jsonp",

success: function( data ) {

var results = [];

results= processResults(data,results);

response(results);

}

});

},

minLength: 3

});

function processResults(data,results){

$(data.items[0].value).find('Location').each(function() {

var name = $.trim($(this).find('Name').text());

results[results.length] = {

'label':name,

'value': name

}

});

return results

}

This code perfectly in firefox, safari, chrome but it fails in IE 8,

i tried to debug it, seems response is getting correctly from the server, upto the search script it works perfect but on this code this.response = function() {

return b._response.apply(b, arguments)

};

b._response.apply seems undefined,

Please let me know is it bug in autocomplete