Index: layer.c
===================================================================
--- layer.c	(revision 29660)
+++ layer.c	(revision 29661)
@@ -674,6 +674,9 @@
 	pcb_layergrp_notify_chg(pcb);
 	pcb_layervis_change_group_vis(&pcb->hidlib, new_lid, 1, 1);
 	pcb_event(&pcb->hidlib, PCB_EVENT_LAYERVIS_CHANGED, NULL);
+
+	pcb_message(PCB_MSG_WARNING, "this operation is not undoable.\n");
+/*		pcb_undo_inc_serial();*/
 }
 
 static void pcb_layer_move_delete(pcb_board_t *pcb, pcb_layer_id_t old_index, pcb_layergrp_id_t new_in_grp)
@@ -724,6 +727,8 @@
 			pcb_layer_stack[l]--;
 
 	pcb_layergrp_notify_chg(pcb);
+	pcb_message(PCB_MSG_WARNING, "this operation is not undoable.\n");
+/*		pcb_undo_inc_serial();*/
 }
 
 
@@ -765,15 +770,9 @@
 		   The new layer design presents the layers by groups to preserve physical
 		   order. In this system the index of the logical layer on the logical
 		   layer list is insignificant, thus we shouldn't try to change it. */
+		return 1;
 	}
 
-	if (at >= 0) {
-		pcb_undo_add_layer_move(old_index, new_index, at);
-		pcb_undo_inc_serial();
-	}
-	else
-		pcb_message(PCB_MSG_WARNING, "this operation is not undoable.\n");
-
 	return 0;
 }