Странные ответы от CasperJS

//System Vars 
var system = require('system'), 
    casper = require('casper').create({ 
        verbose: true, 
        logLevel: "debug", 
        userAgent: 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_5) AppleWebKit/537.4 (KHTML, like Gecko) Chrome/22.0.1229.94 Safari/537.4' 
    }), 
    format = require('utils').format; 
 
//Local Vars 
var source = casper.cli.get('source') || 'en', 
    target = casper.cli.get('target'), 
    data = casper.cli.get(0), 
    url = format('http://www.bing.com/translator?from=%s&to=%s', source, target), 
    result; 
 
//CasperJS options 
casper.options.waitTimeout = 20000; 
 
 
if (!target) { 
    casper.warn('The --target option is mandatory.').exit(1); 
} 
 
casper.start(url, function() { 
    console.log('Page Loaded'); 
}) 
 
casper.waitForSelector('#srcText', function() { 
 
    var text = JSON.parse(atob(data)).join('\n'); 
    var rows_count = JSON.parse(atob(data)).length - 1; 
 
    this.sendKeys('#srcText', text); 
     
    this.then(function() { 
        this.click('#TranslateButton'); 
        this.waitForSelector('div[paragraphname="paragraph'+rows_count+'"]', function() { 
            listItems = this.evaluate(function () { 
                var nodes = document.querySelectorAll('#destText > div'); 
                return [].map.call(nodes, function(node) { 
                    return node.textContent; 
                }); 
            }); 
            this.echo(JSON.stringify(listItems)); 
        }); 
    }); 
 
 
}); 
 
casper.run();