Index: /home/sune/django/django/utils/httpwrappers.py
===================================================================
--- /home/sune/django/django/utils/httpwrappers.py	(revision 671)
+++ /home/sune/django/django/utils/httpwrappers.py	(working copy)
@@ -2,7 +2,6 @@
 from pprint import pformat
 from urllib import urlencode
 import datastructures
-from django.conf.settings import DEFAULT_MIME_TYPE
 
 class HttpRequest(object): # needs to be new-style class because subclasses define "property"s
     "A basic HTTP request"
@@ -135,9 +134,13 @@
 
 class HttpResponse:
     "A basic HTTP response, with content and dictionary-accessed headers"
-    def __init__(self, content='', mimetype=DEFAULT_MIME_TYPE):
+    def __init__(self, content='', mimetype=None):
+        if mimetype is None:
+            from django.conf.settings import DEFAULT_MIME_TYPE
+            mimetype = DEFAULT_MIME_TYPE
+
         self.content = content
-        self.headers = {'Content-Type':mimetype}
+        self.headers = {'Content-Type': mimetype}
         self.cookies = SimpleCookie()
         self.status_code = 200