diff --git a/gtk2_ardour/editor_mouse.cc b/gtk2_ardour/editor_mouse.cc
index 23d1426ac3..c11fde58c2 100644
--- a/gtk2_ardour/editor_mouse.cc
+++ b/gtk2_ardour/editor_mouse.cc
@@ -1521,18 +1521,11 @@ Editor::motion_handler (ArdourCanvas::Item* item, GdkEvent* event, ItemType item
 		if (!drag_info.move_threshold_passed) {
 
 			drag_info.move_threshold_passed = (abs ((int) (drag_info.current_pointer_x - drag_info.grab_x)) > 4);
-			
-			/* if we are dragging Regions we must also consider a change in track
-			** as passing the move threshold, otherwise e.g. copying regions to
-			** the same temporal position on a different track doesn't work.
-			*/
-			if (drag_info.item_type == RegionItem && drag_info.data) {
-				RegionView* rv = reinterpret_cast<RegionView *> (drag_info.data);
-				if (drag_info.last_trackview != &rv->get_time_axis_view()) {
-					drag_info.move_threshold_passed = true;
-				}
+
+			if (drag_info.copy && !drag_info.move_threshold_passed) {
+				drag_info.move_threshold_passed = (abs ((int) (drag_info.current_pointer_y - drag_info.grab_y)) > 4);
 			}
-			      
+
 			// and change the initial grab loc/frame if this drag info wants us to
 
 			if (drag_info.want_move_threshold && drag_info.move_threshold_passed) {
@@ -2837,7 +2830,12 @@ Editor::region_drag_motion_callback (ArdourCanvas::Item* item, GdkEvent* event)
 	vector<int32_t>  height_list(512) ;
 	vector<int32_t>::iterator j;
 
-	if (drag_info.copy && drag_info.move_threshold_passed && drag_info.want_move_threshold) {
+	/* don't copy regions if we're doing x-constrained and we're in the same track, or
+	   if we haven't passed the move threshold yet
+	*/
+
+	if ((drag_info.x_constrained && (drag_info.last_trackview != &rv->get_time_axis_view())) &&
+	     drag_info.copy && drag_info.move_threshold_passed && drag_info.want_move_threshold) {
 
 		drag_info.want_move_threshold = false; // don't copy again
 
@@ -2867,7 +2865,6 @@ Editor::region_drag_motion_callback (ArdourCanvas::Item* item, GdkEvent* event)
 			
 			latest_regionview = 0;
 			
-			
 			/* create a new region with the same name. */
 			
 			// FIXME: ew.  need a (virtual) Region::duplicate() or something?
diff --git a/gtk2_ardour/mixer_ui.cc b/gtk2_ardour/mixer_ui.cc
index f1f8714e80..39d753bf61 100644
--- a/gtk2_ardour/mixer_ui.cc
+++ b/gtk2_ardour/mixer_ui.cc
@@ -896,6 +896,16 @@ Mixer_UI::group_flags_changed (void* src, RouteGroup* group)
 	}
 
 	ENSURE_GUI_THREAD(bind (mem_fun(*this, &Mixer_UI::group_flags_changed), src, group));
+
+	/* force an update of any mixer strips that are using this group,
+	   otherwise mix group names don't change in mixer strips 
+	*/
+
+	for (list<MixerStrip *>::iterator i = strips.begin(); i != strips.end(); ++i) {
+		if ((*i)->mix_group() == group) {
+			(*i)->mix_group_changed(0);
+		}
+	}
 	
 	TreeModel::iterator i;
 	TreeModel::Children rows = group_model->children();