FAQ 149 [http://www.livejournal.com/support/faqbrowse.bml?faqid=149&lang=de&view=full] directs users to their edit profile page to setup an external Friend-of-a-Friend URL. It needs to direct them to http://www.livejournal.com/settings/?tag=foaf instead.
Other things may be incorrect as well, but that came up in a support request.