I would actually want to add the 'joined' signal too, in my list of queries. So, I am now confused, as to what is the difference between :: "buddy-joined" "buddy-joined-activity" "joined" Regards, Ajay <div class="gmail_quote">On Wed, Jul 25, 2012 at 4:05 PM, Ajay Garg <<a href="mailto:ajay@activitycentral.com" target="_blank">ajay@activitycentral.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0pt 0pt 0pt 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hi all. Under what circumstances, is the "buddy-joined" signal used; and in what circumstances is the "buddy-joined-activity" signal used? I ask this, because a simple "grep" on the activities-code-directories, lists these two signals, which hint at the processing required for buddies-joining-activities. Just a simple explanation of the difference between the two signals will do; comprehending code will then be a lot easier :P Thanks and Regards, Ajay </blockquote></div>