diff --git a/gtk2_ardour/mixer_ui.cc b/gtk2_ardour/mixer_ui.cc
index d909557258..e93ec19ffe 100644
--- a/gtk2_ardour/mixer_ui.cc
+++ b/gtk2_ardour/mixer_ui.cc
@@ -399,7 +399,7 @@ Mixer_UI::Mixer_UI ()
 	} else {
 		scroller.set_policy (Gtk::POLICY_ALWAYS, Gtk::POLICY_NEVER);
 
-		vca_label_bar.set_size_request (-1, 16 + 1); /* must match height in GroupTabs::set_size_request()  + 1 border px*/
+		vca_label_bar.set_size_request (-1, 16 + 2); /* must match height in GroupTabs::set_size_request()  + 1 border px + 1 px inner shadow*/
 
 		VBox *mbox = manage (new VBox());
 		mbox->pack_start (vca_label_bar, false, false);
@@ -2946,7 +2946,11 @@ Mixer_UI::parameter_changed (string const & p)
 			_group_tabs->show ();
 			vca_label_bar.show ();
 			Gtk::Requisition group_size = _group_tabs->size_request();
-			vca_label_bar.set_size_request (-1, group_size.height + 1);
+			if (Profile->get_livetrax()) {
+				vca_label_bar.set_size_request (-1, group_size.height + 2);
+			} else {
+				vca_label_bar.set_size_request (-1, group_size.height + 1);
+			}
 		} else {
 			_group_tabs->hide ();
 			vca_label_bar.hide ();