old_contents: from django.conf.urls.defaults import *
  
  from feincms.views import base
  
  urlpatterns = patterns('',
      url(r'^preview/(?P<page_id>\d+)/', base.preview_handler, name='feincms_preview'),
      url(r'^$|^(.*)/$', base.handler), # catch empty URLs (root page) or URLs ending with a slash
  )
  
new_contents: from django.conf.urls.defaults import *
  
  from feincms.views import base
  # from feincms.views import applicationcontent
  
  urlpatterns = patterns('',
      url(r'^preview/(?P<page_id>\d+)/', base.preview_handler, name='feincms_preview'),
      # url(r'^$|^(.*)/$', applicationcontent.handler),
      url(r'^$|^(.*)/$', base.handler), # catch empty URLs (root page) or URLs ending with a slash
  )
  
subject: Add commented out example how to modify urls.py for application content.