This was reported to the Quagga community as bug 813.
https://bugzilla.quagga.net/show_bug.cgi?id=813
The patch has been submitted and attached to that bug.
This patch may be removed if the version of Quagga is updated to a version
that has this bug fixed.
--- ospfd/ospf_apiserver.c
+++ ospfd/ospf_apiserver.c
@@ -375,6 +375,11 @@ ospf_apiserver_free (struct ospf_apiserv
 
     }
 
+  if (apiserv->opaque_types)
+    {
+      list_delete (apiserv->opaque_types);
+    }
+
   /* Close connections to OSPFd. */
   if (apiserv->fd_sync > 0)
     {
@@ -978,10 +978,11 @@ ospf_apiserver_unregister_opaque_type (s
 	  ospf_apiserver_flush_opaque_lsa (apiserv, lsa_type, opaque_type);
 	  ospf_delete_opaque_functab (lsa_type, opaque_type);
 
 	  /* Remove from list of registered opaque types */
 	  listnode_delete (apiserv->opaque_types, regtype);
+	  XFREE(MTYPE_OSPF_APISERVER, regtype);
 
           if (IS_DEBUG_OSPF_EVENT)
             zlog_debug ("API: Del LSA-type(%d)/Opaque-type(%d)"
                        " from apiserv(%p), total#(%d)", 
                        lsa_type, opaque_type, apiserv, 
--- ospfd/ospfd.c
+++ ospfd/ospfd.c
@@ -633,7 +633,7 @@ ospf_area_free (struct ospf_area *area)
   /* Cancel timer. */
   OSPF_TIMER_OFF (area->t_stub_router);
 #ifdef HAVE_OPAQUE_LSA
-  OSPF_TIMER_OFF (area->t_opaque_lsa_self);
+  ospf_opaque_type10_lsa_term (area);
 #endif /* HAVE_OPAQUE_LSA */
   
   if (OSPF_IS_AREA_BACKBONE (area))