--- a/plugins/muc/muc.lib.lua	Mon Apr 29 10:54:25 2013 +0100
+++ b/plugins/muc/muc.lib.lua	Mon Apr 29 11:27:17 2013 +0100
@@ -580,10 +580,9 @@
 end
 
 function room_mt:get_form_layout()
-	local title = "Configuration for "..self.jid;
-	return dataform.new({
-		title = title,
-		instructions = title,
+	local form = dataform.new({
+		title = "Configuration for "..self.jid,
+		instructions = "Complete and submit this form to configure the room.",
 		{
 			name = 'FORM_TYPE',
 			type = 'hidden',
@@ -653,6 +652,7 @@
 			value = tostring(self:get_historylength())
 		}
 	});
+	return module:fire_event("muc-config-form", { room = self, form = form }) or form;
 end
 
 local valid_whois = {
@@ -673,6 +673,10 @@
 
 	local dirty = false
 
+	local event = { room = self, fields = fields, changed = dirty };
+	module:fire_event("muc-config-submitted", event);
+	dirty = event.changed or dirty;
+
 	local name = fields['muc#roomconfig_roomname'];
 	if name ~= self:get_name() then
 		self:set_name(name);
@@ -1049,11 +1053,12 @@
 	return session and session.role or nil;
 end
 function room_mt:can_set_role(actor_jid, occupant_jid, role)
-	local actor = self._occupants[self._jid_nick[actor_jid]];
 	local occupant = self._occupants[occupant_jid];
-	
 	if not occupant or not actor then return nil, "modify", "not-acceptable"; end
 
+	if actor_jid == true then return true; end
+
+	local actor = self._occupants[self._jid_nick[actor_jid]];
 	if actor.role == "moderator" then
 		if occupant.affiliation ~= "owner" and occupant.affiliation ~= "admin" then
 			if actor.affiliation == "owner" or actor.affiliation == "admin" then