fixes #2079

app/controllers/application_controller.rb

@@ -53,10 +53,14 @@ protected
 
     respond_to do |fmt|
       fmt.html do
-        if request.get?
-          redirect_to new_session_path(:url => previous_url), :notice => "Access denied"
+        if CurrentUser.is_anonymous?
+          if request.get?
+            redirect_to new_session_path(:url => previous_url), :notice => "Access denied"
+          else
+            redirect_to new_session_path, :notice => "Access denied"
+          end
         else
-          redirect_to new_session_path, :notice => "Access denied"
+          render :template => "static/access_denied", :status => 403
         end
       end
       fmt.xml do

app/views/static/access_denied.html.erb

@@ -1,5 +1,7 @@
 <h1>Access Denied</h1>
 
+<%= link_to "Go back", :back, :rel => "prev" %>
+
 <% content_for(:page_title) do %>
   Access Denied - <%= Danbooru.config.app_name %>
 <% end %>