Our forum is closed, but we want guests (i.e. users not logged in) to see the message headers and forums, but not the content. This can easily be arranged by setting the approriate rights for the user group "Guests". Then when a guest clicks on a mesage or forum, he or she just gets a blanc page. In itself this is good (the user does not get access to message or forum) but it would be much nicer if the user gets a notification or message saying "You must be logged in to see this content" (or something similar). Is that possible?