diff --git a/gtk2_ardour/ardour_ui.cc b/gtk2_ardour/ardour_ui.cc
index c985712b30..0e1647c3d8 100644
--- a/gtk2_ardour/ardour_ui.cc
+++ b/gtk2_ardour/ardour_ui.cc
@@ -901,8 +901,7 @@ If you still wish to quit, please use the\n\n\
 
 		second_connection.disconnect ();
 		point_one_second_connection.disconnect ();
-		point_oh_five_second_connection.disconnect ();
-		point_zero_one_second_connection.disconnect();
+		point_zero_something_second_connection.disconnect();
 	}
 
 	delete ARDOUR_UI::instance()->video_timeline;
@@ -1032,9 +1031,9 @@ ARDOUR_UI::every_point_one_seconds ()
 }
 
 gint
-ARDOUR_UI::every_point_zero_one_seconds ()
+ARDOUR_UI::every_point_zero_something_seconds ()
 {
-	// august 2007: actual update frequency: 40Hz, not 100Hz
+	// august 2007: actual update frequency: 25Hz (40ms), not 100Hz
 
 	SuperRapidScreenUpdate(); /* EMIT_SIGNAL */
 	return TRUE;
diff --git a/gtk2_ardour/ardour_ui.h b/gtk2_ardour/ardour_ui.h
index b3b86af4f3..6f78224628 100644
--- a/gtk2_ardour/ardour_ui.h
+++ b/gtk2_ardour/ardour_ui.h
@@ -176,10 +176,17 @@ class ARDOUR_UI : public Gtkmm2ext::UI, public ARDOUR::SessionHandlePtr
 
 	static PublicEditor* _instance;
 	static sigc::signal<void,bool> Blink;
+
+	/** point_zero_one_seconds -- 10Hz ^= 100ms */
 	static sigc::signal<void>      RapidScreenUpdate;
+
+	/** point_zero_something_seconds -- currently 25Hz ^= 40ms */
 	static sigc::signal<void>      SuperRapidScreenUpdate;
+
 	/** Emitted frequently with the audible frame, false, and the edit point as
 	 *  parameters respectively.
+	 *
+	 *  (either RapidScreenUpdate || SuperRapidScreenUpdate - user-config)
 	 */
 	static sigc::signal<void, framepos_t, bool, framepos_t> Clock;
 
@@ -520,12 +527,11 @@ class ARDOUR_UI : public Gtkmm2ext::UI, public ARDOUR::SessionHandlePtr
 	
 	gint every_second ();
 	gint every_point_one_seconds ();
-	gint every_point_zero_one_seconds ();
+	gint every_point_zero_something_seconds ();
 
 	sigc::connection second_connection;
 	sigc::connection point_one_second_connection;
-	sigc::connection point_oh_five_second_connection;
-	sigc::connection point_zero_one_second_connection;
+	sigc::connection point_zero_something_second_connection;
 
 	void open_session ();
 	void open_recent_session ();
diff --git a/gtk2_ardour/ardour_ui_dialogs.cc b/gtk2_ardour/ardour_ui_dialogs.cc
index 5422bb9957..8c78d6494d 100644
--- a/gtk2_ardour/ardour_ui_dialogs.cc
+++ b/gtk2_ardour/ardour_ui_dialogs.cc
@@ -183,7 +183,7 @@ ARDOUR_UI::set_session (Session *s)
 
 	second_connection = Glib::signal_timeout().connect (sigc::mem_fun(*this, &ARDOUR_UI::every_second), 1000);
 	point_one_second_connection = Glib::signal_timeout().connect (sigc::mem_fun(*this, &ARDOUR_UI::every_point_one_seconds), 100);
-	point_zero_one_second_connection = Glib::signal_timeout().connect (sigc::mem_fun(*this, &ARDOUR_UI::every_point_zero_one_seconds), 40);
+	point_zero_something_second_connection = Glib::signal_timeout().connect (sigc::mem_fun(*this, &ARDOUR_UI::every_point_zero_something_seconds), 40);
 
 	update_format ();
 }
@@ -223,8 +223,7 @@ ARDOUR_UI::unload_session (bool hide_stuff)
 
 	second_connection.disconnect ();
 	point_one_second_connection.disconnect ();
-	point_oh_five_second_connection.disconnect ();
-	point_zero_one_second_connection.disconnect();
+	point_zero_something_second_connection.disconnect();
 
 	ActionManager::set_sensitive (ActionManager::session_sensitive_actions, false);