diff --git a/gtk2_ardour/editor.cc b/gtk2_ardour/editor.cc
index ec5fe5c673..a1c3a58539 100644
--- a/gtk2_ardour/editor.cc
+++ b/gtk2_ardour/editor.cc
@@ -197,7 +197,6 @@ DragInfo::clear_copied_locations ()
 	copied_locations.clear ();
 }
 
-#ifdef GTKOSX
 static void
 pane_size_watcher (Paned* pane)
 {
@@ -208,7 +207,7 @@ pane_size_watcher (Paned* pane)
 	   ugh.
 	*/
 
-	int max_width_of_lhs = GTK_WIDGET(pane->gobj())->allocation.width - 25;
+	int max_width_of_lhs = GTK_WIDGET(pane->gobj())->allocation.width - 62;
 
 	gint pos = pane->get_position ();
 
@@ -216,7 +215,6 @@ pane_size_watcher (Paned* pane)
 		pane->set_position (max_width_of_lhs);
 	}
 }
-#endif
 
 Editor::Editor ()
 	: 
@@ -747,10 +745,9 @@ Editor::Editor ()
 	edit_pane.pack2 (the_notebook, false, true);
 	
 	edit_pane.signal_size_allocate().connect (bind (mem_fun(*this, &Editor::pane_allocation_handler), static_cast<Paned*> (&edit_pane)));
-#ifdef GTKOSX
+
 	Glib::PropertyProxy<int> proxy = edit_pane.property_position();
 	proxy.signal_changed().connect (bind (sigc::ptr_fun (pane_size_watcher), static_cast<Paned*> (&edit_pane)));
-#endif
 
 	top_hbox.pack_start (toolbar_frame, true, true);
 
diff --git a/gtk2_ardour/mixer_ui.cc b/gtk2_ardour/mixer_ui.cc
index 8cb8dece9f..7339a4a8dd 100644
--- a/gtk2_ardour/mixer_ui.cc
+++ b/gtk2_ardour/mixer_ui.cc
@@ -59,6 +59,25 @@ using namespace std;
 
 using PBD::atoi;
 
+static void
+pane_size_watcher (Paned* pane)
+{
+	/* if the handle of a pane vanishes into (at least) the tabs of a notebook,
+	   it is no longer accessible. so stop that. this doesn't happen on X11,
+	   just the quartz backend.
+	   
+	   ugh.
+	*/
+
+	gint pos = pane->get_position ();
+
+	if (pos < 22) {
+		pane->set_position (22);
+	}
+}
+
+
+
 Mixer_UI::Mixer_UI ()
 	: Window (Gtk::WINDOW_TOPLEVEL)
 {
@@ -218,6 +237,10 @@ Mixer_UI::Mixer_UI ()
 							static_cast<Gtk::Paned*> (&rhs_pane1)));
 	list_hpane.signal_size_allocate().connect (bind (mem_fun(*this, &Mixer_UI::pane_allocation_handler), 
 							 static_cast<Gtk::Paned*> (&list_hpane)));
+
+	Glib::PropertyProxy<int> proxy = list_hpane.property_position();
+	proxy.signal_changed().connect (bind (sigc::ptr_fun (pane_size_watcher), static_cast<Paned*> (&list_hpane)));
+
 	
 	global_vpacker.pack_start (list_hpane, true, true);
 
diff --git a/gtk2_ardour/utils.cc b/gtk2_ardour/utils.cc
index 84482dd328..7fadf0e28a 100644
--- a/gtk2_ardour/utils.cc
+++ b/gtk2_ardour/utils.cc
@@ -485,7 +485,7 @@ key_press_focus_accelerator_handler (Gtk::Window& window, GdkEventKey* ev)
 	bool special_handling_of_unmodified_accelerators = false;
 	bool allow_activating = true;
 
-//#define DEBUG_ACCELERATOR_HANDLING
+// #define DEBUG_ACCELERATOR_HANDLING
 #ifdef  DEBUG_ACCELERATOR_HANDLING
 	//bool debug = (getenv ("ARDOUR_DEBUG_ACCELERATOR_HANDLING") != 0);
 	bool debug=true;
@@ -510,7 +510,8 @@ key_press_focus_accelerator_handler (Gtk::Window& window, GdkEventKey* ev)
 	if (debug) {
 		cerr << "Win = " << win << " Key event: code = " << ev->keyval << " name = " << gdk_keyval_name (ev->keyval) << " state = " << hex << ev->state << dec 
 		     << " ctrl " << ((ev->state & GDK_CONTROL_MASK) ? 1 : 0)
-		     << " alt " << ((ev->state & GDK_MOD1_MASK) ? 1 : 0)
+		     << " alt/mod1 " << ((ev->state & GDK_MOD1_MASK) ? 1 : 0)
+		     << " mod2 " << ((ev->state & GDK_MOD2_MASK) ? 1 : 0)
 		     << " shift " << ((ev->state & GDK_SHIFT_MASK) ? 1 : 0)
 		     << " cmd/meta " << ((ev->state & GDK_META_MASK) ? 1 : 0)
 		     << " lock " << ((ev->state & GDK_LOCK_MASK) ? 1 : 0)
@@ -568,7 +569,9 @@ key_press_focus_accelerator_handler (Gtk::Window& window, GdkEventKey* ev)
 #ifdef DEBUG_ACCELERATOR_HANDLING
 				cerr << "Remapped " << gdk_keyval_name (ev->keyval) << " to " << gdk_keyval_name (keyval_without_alt) << endl;
 
-#endif				ev->keyval = keyval_without_alt;
+#endif
+				ev->keyval = keyval_without_alt;
+				ev->group = 0;
 			}
 		}
 	}