When trying to retrieve the xml string for an element, the code which was working in ie8 does not work with ie9

$(XMLdata).find('CFPersonRow').each(function(){
                                 
    var pid = $(this).find('PersonId').text();
       
    myData[i] = {   id:$(this).find('PersonId').text(), 
                    name:$(this).find('Name').text(),                                                  dob:$(this).find('BirthDate').text(),
                                address:$(this).find('MainAddress').text(),
                                telNo:$(this).find('MainTelNumber').text()
                        };
                
                personsArray[pid] = $(this)[0].xml;
                i++;
            });  

$(this)[0].xml was returns the full XML string in compatibility mode but when using ie9 mode the result is 'undefined'.

testes in 1.6.1 and 1.5.2 with same results