diff --git a/constance/admin.py b/constance/admin.py
index 5702f7b..14400d6 100644
--- a/constance/admin.py
+++ b/constance/admin.py
@@ -6,7 +6,7 @@ from django import forms
 from django.contrib import admin, messages
 from django.contrib.admin import widgets
 from django.contrib.admin.options import csrf_protect_m
-from django.conf.urls.defaults import patterns, url
+from django.conf.urls import patterns, url
 from django.forms import fields
 from django.http import HttpResponseRedirect
 from django.shortcuts import render_to_response
@@ -116,11 +116,11 @@ class ConstanceAdmin(admin.ModelAdmin):
     def has_delete_permission(self, *args, **kwargs):
         return False
 
-    def has_change_permission(self, request, obj=None, *args, **kwargs):
-        if request.user.is_superuser:
-            return True
+    def has_change_permission(self, request, obj=None):
+        if settings.SUPERUSER_ONLY:
+            return request.user.is_superuser
         else:
-            return False
+            return super(ConstanceAdmin, self).has_change_permission(request, obj)
 
 
 class Config(object):
diff --git a/constance/backends/database/__init__.py b/constance/backends/database/__init__.py
index 4d93566..d0e4bb0 100644
--- a/constance/backends/database/__init__.py
+++ b/constance/backends/database/__init__.py
@@ -1,6 +1,5 @@
 from django.core.exceptions import ImproperlyConfigured
 from django.db.models.signals import post_save
-from django.utils.functional import memoize
 from django.core.cache import get_cache
 from django.core.cache.backends.locmem import CacheClass as LocMemCacheClass
 
diff --git a/constance/locale/pl/LC_MESSAGES/django.mo b/constance/locale/pl/LC_MESSAGES/django.mo
new file mode 100644
index 0000000..350d51c
Binary files /dev/null and b/constance/locale/pl/LC_MESSAGES/django.mo differ
diff --git a/constance/locale/pl/LC_MESSAGES/django.po b/constance/locale/pl/LC_MESSAGES/django.po
new file mode 100644
index 0000000..9f97247
--- /dev/null
+++ b/constance/locale/pl/LC_MESSAGES/django.po
@@ -0,0 +1,60 @@
+# SOME DESCRIPTIVE TITLE.
+# Copyright (C) YEAR THE PACKAGE'S COPYRIGHT HOLDER
+# This file is distributed under the same license as the PACKAGE package.
+# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
+#
+#, fuzzy
+msgid ""
+msgstr ""
+"Project-Id-Version: 0.4\n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2012-09-03 02:32+0200\n"
+"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
+"Last-Translator: Janusz Harkot <janusz.harkot@gmail.com>\n"
+"Language-Team: LANGUAGE <LL@li.org>\n"
+"Language: pl\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"Plural-Forms: nplurals=3; plural=(n==1 ? 0 : n%10>=2 && n%10<=4 && (n%100<10 "
+"|| n%100>=20) ? 1 : 2)\n"
+
+#: admin.py:79
+msgid "Live settings updated successfully."
+msgstr "Parametry zostały zaktualizowane"
+
+#: admin.py:83
+msgid "Constance config"
+msgstr "Konfiguracja Constance"
+
+#: backends/database/models.py:18
+msgid "constance"
+msgstr "parametr"
+
+#: backends/database/models.py:19
+msgid "constances"
+msgstr "parametry"
+
+#: templates/admin/constance/change_list.html:39
+msgid "Name"
+msgstr "Nazwa"
+
+#: templates/admin/constance/change_list.html:40
+msgid "Default"
+msgstr "Domyślnie"
+
+#: templates/admin/constance/change_list.html:41
+msgid "Value"
+msgstr "Wartość"
+
+#: templates/admin/constance/change_list.html:42
+msgid "Is modified"
+msgstr "Zmodyfikowana"
+
+#: templates/admin/constance/change_list.html:68
+msgid "Save"
+msgstr "Zapisz"
+
+#: templates/admin/constance/change_list.html:78
+msgid "Home"
+msgstr "Początek"
diff --git a/constance/settings.py b/constance/settings.py
index 83e4648..86a6354 100644
--- a/constance/settings.py
+++ b/constance/settings.py
@@ -20,3 +20,5 @@ REDIS_CONNECTION = getattr(settings, 'CONSTANCE_REDIS_CONNECTION',
 
 DATABASE_CACHE_BACKEND = getattr(settings, 'CONSTANCE_DATABASE_CACHE_BACKEND',
                                  None)
+
+SUPERUSER_ONLY = getattr(settings, 'CONSTANCE_ACCESS_SUPERUSER_ONLY', True)
diff --git a/constance/templates/admin/constance/change_list.html b/constance/templates/admin/constance/change_list.html
index ef1fa89..77a63e5 100644
--- a/constance/templates/admin/constance/change_list.html
+++ b/constance/templates/admin/constance/change_list.html
@@ -1,11 +1,11 @@
 {% extends "admin/base_site.html" %}
-{% load adminmedia admin_list i18n %}
+{% load admin_static admin_list i18n %}
 
 
 {% block extrastyle %}
   {{ block.super }}
-  <link rel="stylesheet" type="text/css" href="{% admin_media_prefix %}css/changelists.css" />
-  <link rel="stylesheet" type="text/css" href="{% admin_media_prefix %}css/forms.css" />
+  <link rel="stylesheet" type="text/css" href="{% static 'admin/css/changelists.css' %}" />
+  <link rel="stylesheet" type="text/css" href="{% static 'admin/css/forms.css' %}" />
   {{ media.css }}
 <style>
 #result_list .changed {
@@ -55,7 +55,11 @@
                             {{item.form_field}}
                         </td>
                     <td>
-                        <img src="{% admin_media_prefix %}img/icon-{% if item.modified %}yes{% else %}no{% endif %}.gif" alt="{{ item.modified }}" />
+                        {% if item.modified %}
+                            <img src="{% static 'admin/img/icon-yes.gif' %}" alt="{{ item.modified }}" />
+                        {% else %}
+                            <img src="{% static 'admin/img/icon-no.gif' %}" alt="{{ item.modified }}" />
+                        {% endif %}
                     </td>
                     </tr>
                 {% endfor %}