Index: /trunk/src/org/openstreetmap/josm/tools/AudioPlayer.java
===================================================================
--- /trunk/src/org/openstreetmap/josm/tools/AudioPlayer.java	(revision 3263)
+++ /trunk/src/org/openstreetmap/josm/tools/AudioPlayer.java	(revision 3264)
@@ -339,6 +339,11 @@
 
     public static void audioMalfunction(Exception ex) {
+        String msg = ex.getMessage();
+        if(msg == null)
+            msg = tr("unspecified reason");
+        else
+            msg = tr(msg);
         JOptionPane.showMessageDialog(Main.parent,
-                "<html><p>" + tr(ex.getMessage()) + "</p></html>",
+                "<html><p>" + msg + "</p></html>",
                 tr("Error playing sound"), JOptionPane.ERROR_MESSAGE);
     }
