diff --git a/src/java/com/threerings/media/AbstractMedia.java b/src/java/com/threerings/media/AbstractMedia.java
index 00f321cf9..18551d423 100644
--- a/src/java/com/threerings/media/AbstractMedia.java
+++ b/src/java/com/threerings/media/AbstractMedia.java
@@ -1,5 +1,5 @@
 //
-// $Id: AbstractMedia.java,v 1.13 2004/11/11 23:52:43 mdb Exp $
+// $Id$
 //
 // Narya library - tools for developing networked games
 // Copyright (C) 2002-2004 Three Rings Design, Inc., All Rights Reserved
@@ -275,6 +275,7 @@ public abstract class AbstractMedia
      */
     protected void shutdown ()
     {
+        invalidate();
         _mgr = null;
     }