diff -ru libquicktime-1.1.5-orig/utils/gtk/libquicktime_config.c libquicktime-1.1.5/utils/gtk/libquicktime_config.c
--- libquicktime-1.1.5-orig/utils/gtk/libquicktime_config.c	2008-12-30 11:05:36.000000000 -0500
+++ libquicktime-1.1.5/utils/gtk/libquicktime_config.c	2010-11-01 01:39:50.206114397 -0400
@@ -112,8 +112,8 @@
                    G_CALLBACK(main_window_button_callback),
                    (gpointer)ret);
 
-  GTK_WIDGET_SET_FLAGS (ret->close_button, GTK_CAN_DEFAULT);
-  GTK_WIDGET_SET_FLAGS (ret->save_button, GTK_CAN_DEFAULT);
+  gtk_widget_set_can_default(ret->close_button, TRUE);
+  gtk_widget_set_can_default(ret->save_button, TRUE);
   
   gtk_widget_show(ret->close_button);
   gtk_widget_show(ret->save_button);
diff -ru libquicktime-1.1.5-orig/utils/gtk/lqt_gtk.c libquicktime-1.1.5/utils/gtk/lqt_gtk.c
--- libquicktime-1.1.5-orig/utils/gtk/lqt_gtk.c	2009-03-11 10:25:50.000000000 -0400
+++ libquicktime-1.1.5/utils/gtk/lqt_gtk.c	2010-11-01 01:43:01.864114396 -0400
@@ -941,9 +941,9 @@
 		   G_CALLBACK(codec_config_window_button_callback),
 		   (gpointer)ret);
 
-  GTK_WIDGET_SET_FLAGS (ret->apply_button, GTK_CAN_DEFAULT);
-  GTK_WIDGET_SET_FLAGS (ret->close_button, GTK_CAN_DEFAULT);
-  GTK_WIDGET_SET_FLAGS (ret->restore_button, GTK_CAN_DEFAULT);
+  gtk_widget_set_can_default(ret->apply_button, TRUE);
+  gtk_widget_set_can_default(ret->close_button, TRUE);
+  gtk_widget_set_can_default(ret->restore_button, TRUE);
 
   gtk_widget_show(ret->apply_button);
   gtk_widget_show(ret->close_button);
@@ -1240,7 +1240,7 @@
   ret->mainbox = gtk_vbox_new(0, 10);
 
   ret->close_button = gtk_button_new_from_stock(GTK_STOCK_CLOSE);
-  GTK_WIDGET_SET_FLAGS (ret->close_button, GTK_CAN_DEFAULT);
+  gtk_widget_set_can_default(ret->close_button, TRUE);
 
   g_signal_connect(G_OBJECT(ret->close_button), "clicked",
                      G_CALLBACK(codec_info_window_button_callback),