Index: django/contrib/auth/management/__init__.py
===================================================================
--- django/contrib/auth/management/__init__.py	(revision 10559)
+++ django/contrib/auth/management/__init__.py	(working copy)
@@ -18,6 +18,7 @@
 def create_permissions(app, created_models, verbosity, **kwargs):
     from django.contrib.contenttypes.models import ContentType
     from django.contrib.auth.models import Permission
+    ContentType.objects.clear_cache()
     app_models = get_models(app)
     if not app_models:
         return