diff --git a/gtk2_ardour/mixer_ui.cc b/gtk2_ardour/mixer_ui.cc
index 1f5a627936..fc2af3265d 100644
--- a/gtk2_ardour/mixer_ui.cc
+++ b/gtk2_ardour/mixer_ui.cc
@@ -437,7 +437,8 @@ Mixer_UI::add_strips (RouteList& routes)
 			strip->signal_button_release_event().connect (sigc::bind (sigc::mem_fun(*this, &Mixer_UI::strip_button_release_event), strip));
 		}
 
-	} catch (...) {
+	} catch (const std::exception& e) {
+		error << string_compose (_("Error adding GUI elements for new tracks/busses %1"), e.what()) << endmsg;
 	}
 
 	no_track_list_redisplay = false;
diff --git a/gtk2_ardour/monitor_section.cc b/gtk2_ardour/monitor_section.cc
index 294ef822d4..4bc5e5ab47 100644
--- a/gtk2_ardour/monitor_section.cc
+++ b/gtk2_ardour/monitor_section.cc
@@ -185,9 +185,9 @@ MonitorSection::MonitorSection (Session* s)
 	toggle_processorbox_button.set_name (X_("monitor section processors toggle"));
 	set_tooltip (&toggle_processorbox_button, _("Allow one to add monitor effect processors"));
 
-	proctoggle = ToggleAction::create ();
+	proctoggle = myactions.register_toggle_action (monitor_actions, "toggle-monitor-processor-box", _("Toggle Monitor Section Processor Box"),
+	                                               sigc::mem_fun(*this, &MonitorSection::update_processor_box));
 	toggle_processorbox_button.set_related_action (proctoggle);
-	proctoggle->signal_toggled().connect (sigc::mem_fun(*this, &MonitorSection::update_processor_box), false);
 
 	/* Knobs */
 	Label* solo_boost_label;
@@ -508,7 +508,7 @@ MonitorSection::~MonitorSection ()
 void
 MonitorSection::update_processor_box ()
 {
-	bool show_processor_box = proctoggle->get_active ();
+	bool show_processor_box = Glib::RefPtr<ToggleAction>::cast_dynamic (proctoggle)->get_active ();
 
 	if (count_processors () > 0 && !show_processor_box) {
 		toggle_processorbox_button.set_name (X_("monitor section processors present"));
diff --git a/gtk2_ardour/monitor_section.h b/gtk2_ardour/monitor_section.h
index 2db5d54c1d..82d23336ab 100644
--- a/gtk2_ardour/monitor_section.h
+++ b/gtk2_ardour/monitor_section.h
@@ -174,7 +174,7 @@ class MonitorSection : public RouteUI
 	uint32_t count_processors ();
 
 	void processors_changed (ARDOUR::RouteProcessorChange);
-	Glib::RefPtr<Gtk::ToggleAction> proctoggle;
+	Glib::RefPtr<Gtk::Action> proctoggle;
 	bool _ui_initialized;
 
   private: