diff -r f1eeb049a0a5 -r b11bac42d56f plugins/mod_presence.lua
--- a/plugins/mod_presence.lua	Tue Jul 21 13:21:52 2009 +0100
+++ b/plugins/mod_presence.lua	Wed Jul 22 21:35:41 2009 +0100
@@ -207,6 +207,11 @@
 	local st_from, st_to = stanza.attr.from, stanza.attr.to;
 	stanza.attr.from, stanza.attr.to = from_bare, to_bare;
 	log("debug", "inbound presence "..stanza.attr.type.." from "..from_bare.." for "..to_bare);
+	
+	if not node then
+		log("debug", "dropping presence sent to host or invalid address '%s'", tostring(to_bare));
+	end
+	
 	if stanza.attr.type == "probe" then
 		if rostermanager.is_contact_subscribed(node, host, from_bare) then
 			if 0 == send_presence_of_available_resources(node, host, st_from, origin, core_route_stanza) then