Index: trunk/src_plugins/dialogs/dlg_layer_flags.c
===================================================================
--- trunk/src_plugins/dialogs/dlg_layer_flags.c	(revision 33167)
+++ trunk/src_plugins/dialogs/dlg_layer_flags.c	(revision 33168)
@@ -80,8 +80,8 @@
 		if (dlg[wsub].val.lng) comb |= PCB_LYC_SUB;
 		if (dlg[wauto].val.lng) comb |= PCB_LYC_AUTO;
 		if (ly->comb != comb) {
-			ly->comb = comb;
-			pcb_board_set_changed_flag(PCB, rnd_true);
+			if (pcb_layer_recomb(ly, comb, 1) == 0)
+				rnd_gui->invalidate_all(rnd_gui);
 		}
 	}
 	else