title: Django loading initial data prevents errors being displayed
body: <p>I have a Django page with a form. I have some view code which deals with the form as normal but prepopulates the form with initial data from the a user's session if available. This is so that when a user returns to this form they see previously selected options (yes, the form is quite extensive).</p>
  
  <p>My views,py:</p>
  
  <pre><code>def myView(request):   
      ...
      form = ProjectInfoForm(request.POST or None)
      if form.is_valid():
          # process form, including a redirect
          ...
  
      # if there is form data in the session, let's use that
      # to initaliaze our from with data
      if key in request.session:
          form = ProjectInfoForm(
              initial={
                   'model': request.session.get('model'),
                   ...
              }
          )
      return render_to_response(template_name, {
          ...
      }, RequestContext(request))
  </code></pre>
  
  <p>Problem is: if I load the session data then the page does not display any error messages. The form does fail validation, I am just not getting the any output. Is there some conflict here with <code>initial</code>?</p>
  
  <p>Any help would be much appreciated.</p>