问Yepnope回调总是返回'result = false‘

EN

    yepnope([
        {
            load: {
                "style" : "css!<?php bloginfo('stylesheet_url'); ?>",
                "fonts" : "timeout=4000!css!http://yui.yahooapis.com/2.9.0/build/fonts/fonts-min.css",
                "jquery" : "timeout=4000!//ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.js",
                "fbSDK" : "local!/js/FBsdk.js",
                "detect" : "local!/js/detectDevice.js",
            },
            callback: {
                "fonts": function() {
                    console.log(arguments);// the second argument is
                },                         // always false
                "jquery": function() {
                    if ( !window.jQuery ) {
                        yepnope('local!/js/jQuery-1.7.js');
                    }
                }
            }
        }
    }