diff --git a/ChangeLog b/ChangeLog
index 5982f2a20..c77e2ea96 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -29,8 +29,10 @@ Changes in version 0.1.2.15 - 2007-07-??
       guard list unless we need to.
 
   o Minor bugfixes (directory):
-    - Count the number of authorities that recommend each version
-      correctly.  Previously, we were under-counting by 1.
+    - Correctly count the number of authorities that recommend each
+      version. Previously, we were under-counting by 1.
+    - Fix a potential crash bug when we load many server descriptors at
+      once and some of them make others of them obsolete. Fixes bug 458.
 
   o Minor bugfixes (hidden services):
     - Stop tearing down the whole circuit when the user asks for a
diff --git a/src/or/routerlist.c b/src/or/routerlist.c
index 940371ef8..a94324d3f 100644
--- a/src/or/routerlist.c
+++ b/src/or/routerlist.c
@@ -2364,13 +2364,13 @@ router_load_routers_from_string(const char *s, size_t len,
       }
     }
 
-    if (router_add_to_routerlist(ri, &msg, from_cache, !from_cache) >= 0)
+    if (router_add_to_routerlist(ri, &msg, from_cache, !from_cache) >= 0) {
       smartlist_add(changed, ri);
+      control_event_descriptors_changed(changed);
+      smartlist_clear(changed);
+    }
   });
 
-  if (smartlist_len(changed))
-    control_event_descriptors_changed(changed);
-
   routerlist_assert_ok(routerlist);
   router_rebuild_store(0);