title: Filter by Date Range not working django
body: <p>My model is:</p>
  
  <pre><code>class Report(models.Model):
      created = models.DateTimeField(auto_now_add=True)
  </code></pre>
  
  <p>My views is:</p>
  
  <pre><code>def filter_range(request):
      results = Report.objects.filter(created__range=['2012/01/09 00:00','2012/01/11 23:59'])
      return render_to_response("log/filter.html", {'results':results})
  </code></pre>
  
  <p>It gives the error:</p>
  
  <pre><code>Exception Type:     ValidationError
  Exception Value:    [u'Enter a valid date/time in YYYY-MM-DD HH:MM[:ss[.uuuuuu]] format.']
  </code></pre>
  
  <p>What could be wrong? Thank you.</p>