Index: gtk2_ardour/ardour_ui_dialogs.cc
===================================================================
--- gtk2_ardour/ardour_ui_dialogs.cc	(revision 3134)
+++ gtk2_ardour/ardour_ui_dialogs.cc	(working copy)
@@ -203,6 +203,9 @@
 	big_clock.set_session (0);
 	preroll_clock.set_session (0);
 	postroll_clock.set_session (0);
+	
+	/* Close the theme manager */
+	theme_manager->hide ();
 
 	if (option_editor) {
 		option_editor->set_session (0);