Upgrade to django 1.5, some functions have been changed

url in templates now requires quotes roung the first arg
USE_TZ added

middleware.py

@@ -19,7 +19,7 @@ class SmartAppendSlashMiddleware(object):
         """
 
         # Check for a redirect based on settings.SMART_APPEND_SLASH
-        host = http.get_host(request)
+        host = http.HttpRequest.get_host(request)
         old_url = [host, request.path]
         new_url = old_url[:]
         # Append a slash if SMART_APPEND_SLASH is set and the resulting URL