File does not upload from web form in Django

Howdy - I've written a very simple app to accept job applications including a resume upload.

Running the bundled server for development locally, I can successfully upload files via the web form on the front end and the admin interface. Running it on the remote server (Apache with mod_python) I can successfully upload files via the admin interface but attempts over the web front end yield no uploaded file.

I've added FILE_UPLOAD_PERMISSIONS = 0644 to settings, checked the two settings files, and looked for similar problems described elsewhere. Figure I'm either forgetting a setting or need to go about this a different way. Any suggestions?

For reference, code included.

The model:

class Application(models.Model):
    job = models.ForeignKey('JobOpening')
    name = models.CharField(max_length=100)
    email = models.EmailField()
    date_applied = models.DateField()
    cover_letter = models.TextField()
    resume = models.FileField(upload_to='job_applications', blank=True)

    def __str__(self):
        return self.name

    def save(self):
        if not self.date_applied:
            self.date_applied = datetime.today
        super(Application, self).save()

The form:

class JobApplicationForm(ModelForm):    
    class Meta:
        model = Application

    def save(self, commit=True, fail_silently=False):
        super(JobApplicationForm, self).save(commit)

The view:

def job_application(request):
    ajax = request.GET.has_key('ajax')
    if request.method == 'POST':
        form = JobApplicationForm(request.POST, request.FILES)
        if form.is_valid():
            new_application = form.save()
            return HttpResponseRedirect('/about/employment/apply/sent/')
    elif request.GET.has_key('job'):
        job = request.GET['job']
        form = JobApplicationForm({'job': job})
    else:
        return HttpResponseRedirect('/ab