jQuery $ .ajaxError () работает на 200 - OK

У меня есть глобальный обработчик ошибок ajax, который работает, даже если xhr.status равен 200, xhr.statusText - "OK", а xhr.responseText - моя строка JSON. Это происходит в firefox и IE.

$.ajax({
    data: {
        method: "getRequestDetails",
        loggedInUsername: loggedInUsername,
        search: search
    },
    success: function(data){
        var arrayObject = eval("(" + data + ")")['DATA'];
        if (arrayObject.length == 0){
            alert("That search term returned no results");
        } else {
            callBeforeShow("Results");
            $.each(arrayObject, function(index, value){
                showJSON(value, "Results");
            });
            callAfterShow("Results");
        }
    }
});

$(document).ajaxError(function(event, XMLHttpRequest, ajaxOptions, thrownError){
    var errorMessage = "Ajax Error\n";
    errorMessage += "Type: " + ajaxOptions.type + "\n";
    errorMessage += "Requesting Page: " + ajaxOptions.url + "\n";
    errorMessage += "Status: " + XMLHttpRequest.status + " - " + XMLHttpRequest.statusText + "\n";
    errorMessage += "Error Thrown: " + thrownError
    alert(errorMessage);
});

В IE это говорит о том, что XMLHttpRequest не готов, а в Firefox это возвращает

«Ошибка AJAX» "Тип: POST" "Страница запроса: something.CFC" «Статус: 200 - ОК» «Возникла ошибка: undefined»

Итак, я решил использовать

$(document).ajaxComplete(function(event, XMLHttpRequest, ajaxOptions, errorThrown){
    if (XMLHttpRequest.status != 200){
        var errorMessage = "Ajax Error\n";
        errorMessage += "Type: " + ajaxOptions.type + "\n";
        errorMessage += "Requesting Page: " + ajaxOptions.url + "\n";
        errorMessage += "Status: " + XMLHttpRequest.status + " - " + XMLHttpRequest.statusText;
        alert(errorMessage);
    }
});

РЕДАКТИРОВАТЬ * Это случается только в некоторых случаях. В большинстве случаев это работает, но иногда запускается $ .ajaxError () * EIDT

{"COLUMNS":["ID","SUMMARY_SPEC","TOTAL_EFFORT","EFFORT_HISTORY","LOG_HISTORY"],"DATA":[[816,"test only","2 Minutes - Last Updated: 09\/12\/2010",{"COLUMNS":["CC_ID","RECORD_ID","USER_ID","USER_NAME","EFFORT_DATE","EFFORT_DAYS","EFFORT_HRS","EFFORT_MINS","EFFORT_TOT_HRS"],"DATA":[[816,496,"ruhlet","Tim Ruhle","December, 09 2010 00:00:00",0,0,1,0.0167],[816,497,"ruhlet","Tim Ruhle","December, 08 2010 00:00:00",0,0,1,0.0167]]},{"COLUMNS":["CC_ID","RECORD_ID","USER_ID","USER_NAME","LOG_DT","LOG_ENTRY"],"DATA":[]}]]}{"COLUMNS":["ID","SUMMARY_SPEC","TOTAL_EFFORT","EFFORT_HISTORY","LOG_HISTORY"],"DATA":[[816,"test only","2 Minutes - Last Updated: 09\/12\/2010",{"COLUMNS":["CC_ID","RECORD_ID","USER_ID","USER_NAME","EFFORT_DATE","EFFORT_DAYS","EFFORT_HRS","EFFORT_MINS","EFFORT_TOT_HRS"],"DATA":[[816,496,"ruhlet","Tim Ruhle","December, 09 2010 00:00:00",0,0,1,0.0167],[816,497,"ruhlet","Tim Ruhle","December, 08 2010 00:00:00",0,0,1,0.0167]]},{"COLUMNS":["CC_ID","RECORD_ID","USER_ID","USER_NAME","LOG_DT","LOG_ENTRY"],"DATA":[]}]]}{"COLUMNS":["ID","SUMMARY_SPEC","TOTAL_EFFORT","EFFORT_HISTORY","LOG_HISTORY"],"DATA":[[816,"test only","2 Minutes - Last Updated: 09\/12\/2010",{"COLUMNS":["CC_ID","RECORD_ID","USER_ID","USER_NAME","EFFORT_DATE","EFFORT_DAYS","EFFORT_HRS","EFFORT_MINS","EFFORT_TOT_HRS"],"DATA":[[816,496,"ruhlet","Tim Ruhle","December, 09 2010 00:00:00",0,0,1,0.0167],[816,497,"ruhlet","Tim Ruhle","December, 08 2010 00:00:00",0,0,1,0.0167]]},{"COLUMNS":["CC_ID","RECORD_ID","USER_ID","USER_NAME","LOG_DT","LOG_ENTRY"],"DATA":[]}]]}

Последняя версия firebug распознает его как json.