fixes #835

app/presenters/post_set_presenters/wiki_page.rb

@@ -3,5 +3,13 @@ module PostSetPresenters
     def posts
       @post_set.posts
     end
+    
+    def post_previews_html(template)
+      result = super(template)
+      if result =~ /Nobody here but us chickens/
+        result = ""
+      end
+      result.html_safe
+    end
   end
 end