--- grandr-0.1/src/callbacks.c	2007-06-19 15:22:41.000000000 +0200
+++ grandr-0.1~/src/callbacks.c	2007-12-04 14:30:54.000000000 +0100
@@ -158,9 +158,12 @@
 	GtkTreeModel *model;
 	GtkTreeIter iter;
 	int mode_id;
+	gboolean iter_ok;
 	
 	model = gtk_combo_box_get_model (combobox);
-	gtk_combo_box_get_active_iter (combobox, &iter);
+	iter_ok = gtk_combo_box_get_active_iter (combobox, &iter);
+	if(!iter_ok) return;
+
   	gtk_tree_model_get (model, &iter,
 		      COL_MODE_ID, &mode_id,
 		      -1);