diff -upr mate-control-center/font-viewer/font-view.c mate-control-center-test/font-viewer/font-view.c
--- mate-control-center/font-viewer/font-view.c	2015-08-30 14:36:05.589541421 +0200
+++ mate-control-center-test/font-viewer/font-view.c	2015-08-30 14:30:49.470247000 +0200
@@ -471,6 +471,9 @@ info_button_clicked_cb (GtkButton *butto
 static void
 font_view_ensure_model (FontViewApplication *self)
 {
+    if (self->model != NULL)
+        return;
+
     self->model = font_view_model_new ();
     g_signal_connect (self->model, "config-changed",
                       G_CALLBACK (font_model_config_changed_cb), self);