diff --git a/ckeditor/static/ckeditor/ckeditor-init.js b/ckeditor/static/ckeditor/ckeditor-init.js
index de939a5..358a8a2 100644
--- a/ckeditor/static/ckeditor/ckeditor-init.js
+++ b/ckeditor/static/ckeditor/ckeditor-init.js
@@ -1,20 +1,23 @@
-$(function() {
+;(function() {
+  var $ = $ || django.jQuery;
+  $(function() {
     initialiseCKEditor();
     initialiseCKEditorInInlinedForms();
 
     function initialiseCKEditorInInlinedForms() {
-        $(".add-row a, .grp-add-handler").click(function () {
-            initialiseCKEditor();
-            return true;
-        });
+      $(document).on("click", ".add-row a, .grp-add-handler", function () {
+        initialiseCKEditor();
+        return true;
+      });
     }
-});
 
-function initialiseCKEditor() {
-    $('textarea[data-type=ckeditortype]').each(function(){
+    function initialiseCKEditor() {
+      $('textarea[data-type=ckeditortype]').each(function(){
         if($(this).data('processed') == "0" && $(this).attr('id').indexOf('__prefix__') == -1){
-            $(this).data('processed',"1");
-            CKEDITOR.replace($(this).attr('id'), $(this).data('config'));
+          $(this).data('processed',"1");
+          CKEDITOR.replace($(this).attr('id'), $(this).data('config'));
         }
-    });
-}
+      });
+    };
+  });
+}());
diff --git a/ckeditor/urls.py b/ckeditor/urls.py
index a88bb0d..e8a3d70 100644
--- a/ckeditor/urls.py
+++ b/ckeditor/urls.py
@@ -1,10 +1,11 @@
 from django.conf.urls import patterns, url
 from django.contrib.admin.views.decorators import staff_member_required
+from django.views.decorators.cache import never_cache
 
 from ckeditor import views
 
 urlpatterns = patterns(
     '',
     url(r'^upload/', staff_member_required(views.upload), name='ckeditor_upload'),
-    url(r'^browse/', staff_member_required(views.browse), name='ckeditor_browse'),
+    url(r'^browse/', never_cache(staff_member_required(views.browse)), name='ckeditor_browse'),
 )
diff --git a/ckeditor/views.py b/ckeditor/views.py
index 336001b..3223581 100644
--- a/ckeditor/views.py
+++ b/ckeditor/views.py
@@ -98,7 +98,7 @@ def get_image_files(user=None, path=''):
         return
 
     for filename in storage_list[STORAGE_FILES]:
-        if os.path.splitext(filename)[0].endswith('_thumb'):
+        if os.path.splitext(filename)[0].endswith('_thumb') or os.path.basename(filename).startswith('.'):
             continue
         filename = os.path.join(browse_path, filename)
         yield filename
diff --git a/ckeditor/widgets.py b/ckeditor/widgets.py
index c322be8..bf68d59 100644
--- a/ckeditor/widgets.py
+++ b/ckeditor/widgets.py
@@ -8,10 +8,19 @@ from django.utils.encoding import force_text
 from django.utils.translation import get_language
 from django.core.exceptions import ImproperlyConfigured
 from django.forms.util import flatatt
-import json
+
+from django.utils.functional import Promise
+from django.utils.encoding import force_text
+from django.core.serializers.json import DjangoJSONEncoder
+
+class LazyEncoder(DjangoJSONEncoder):
+    def default(self, obj):
+        if isinstance(obj, Promise):
+            return force_text(obj)
+        return super(LazyEncoder, self).default(obj)
 
 
-json_encode = json.JSONEncoder().encode
+json_encode = LazyEncoder().encode
 
 DEFAULT_CONFIG = {
     'skin': 'moono',