I have a snippet of code such as:

$.getJSON("http://mysite.org/polls/saveLanguageTest?url=" + escape(window.location.href) + "&callback=?",
              function (data) {
          var serverResponse = data.result;
          console.log(serverResponse);
          alert(serverResponse);
}); 

It works fine in the sense that it makes a cross-domain request to my server and the server saves the data as I expect. Unfortunately, even though the server saves data and sends back a response I just can't get any alert or the console.log run. Why may be that? The server side code is (if that is relevant):

def saveLanguageTest(request):
    callback = request.GET.get('callback', '')

    person = Person(firstName = 'Anonymous',
                    ipAddress = request.META['REMOTE_ADDR'])
    person.save()

    webPage = WebPage(url = request.GET.get('url'))
    webPage.save()

    langTest = LanguageTest(type = 'prepositionTest')
    langTest.person = person
    langTest.webPage = webPage
    langTest.save()

    req ['result'] = 'Your test is saved.'
    response = json.dumps(req)
    response = callback + '(' + response + ');'

    return HttpResponse(response, mimetype = "application/json")

What am I missing? (I tried the same code both within my web pages and inside the Firebug and I always have the problem stated above.)