Index: lams_central/src/flash/org/lamsfoundation/lams/authoring/cv/CanvasController.as
===================================================================
diff -u -r2e97ddd536091a64a868ee3b89018fad86c1e097 -r80ec49b04efe65e9f0fe821c7600c8ae7ca3c27b
--- lams_central/src/flash/org/lamsfoundation/lams/authoring/cv/CanvasController.as	(.../CanvasController.as)	(revision 2e97ddd536091a64a868ee3b89018fad86c1e097)
+++ lams_central/src/flash/org/lamsfoundation/lams/authoring/cv/CanvasController.as	(.../CanvasController.as)	(revision 80ec49b04efe65e9f0fe821c7600c8ae7ca3c27b)
@@ -251,6 +251,8 @@
 				}
 			}
 		}
+		_canvasModel.getCanvas().ddm.validDesign = false;
+		_canvasModel.getCanvas().checkValidDesign();
     }
    
 	/**