Index: gtk2_ardour/editor_mouse.cc
==================================================================
--- gtk2_ardour/editor_mouse.cc		(revision 4443)
+++ gtk2_ardour/editor_mouse.cc		(working copy)
@@ -1000,7 +1000,7 @@
 			case CdMarkerBarItem:
 			case TempoBarItem:
 			case MeterBarItem:
-				popup_ruler_menu (pixel_to_frame(event->button.x), item_type);
+				popup_ruler_menu (leftmost_frame + pixel_to_frame(event->button.x), item_type);
 				break;
 
 			case MarkerItem: