diff -up gnome-applets-2.20.0/mixer/preferences.c.leak gnome-applets-2.20.0/mixer/preferences.c
--- gnome-applets-2.20.0/mixer/preferences.c.leak	2007-09-27 00:49:39.000000000 -0400
+++ gnome-applets-2.20.0/mixer/preferences.c	2007-09-27 00:50:50.000000000 -0400
@@ -445,6 +445,8 @@ cb_track_select (GtkTreeSelection *selec
 	}
       }
     }
+    g_list_foreach (lst, (GFunc)gtk_tree_path_free, NULL);
+    g_list_free (lst);
   }
 
   /* add the one just selected and adjust its volume if it's not the only one