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+.. Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+..
+.. SPDX-License-Identifier: MPL-2.0
+..
+.. This Source Code Form is subject to the terms of the Mozilla Public
+.. License, v. 2.0.  If a copy of the MPL was not distributed with this
+.. file, you can obtain one at https://mozilla.org/MPL/2.0/.
+..
+.. See the COPYRIGHT file distributed with this work for additional
+.. information regarding copyright ownership.
+
+Notes for BIND 9.18.4
+---------------------
+
+Feature Changes
+~~~~~~~~~~~~~~~
+
+- New :any:`dnssec-policy` configuration checks have been added to detect
+  unusual policies, such as missing KSK and/or ZSK and too-short key
+  lifetimes and re-sign periods. :gl:`#1611`
+
+Bug Fixes
+~~~~~~~~~
+
+- The :any:`fetches-per-server` quota is designed to adjust itself downward
+  automatically when an authoritative server times out too frequently.
+  Due to a coding error, that adjustment was applied incorrectly, so
+  that the quota for a congested server was always set to 1. This has
+  been fixed. :gl:`#3327`
+
+- DNSSEC-signed catalog zones were not being processed correctly. This
+  has been fixed. :gl:`#3380`
+
+- Key files were updated every time the :any:`dnssec-policy` key manager
+  ran, whether the metadata had changed or not. :iscman:`named` now
+  checks whether changes were applied before writing out the key files.
+  :gl:`#3302`
+
+Known Issues
+~~~~~~~~~~~~
+
+- There are no new known issues with this release. See :ref:`above
+  <relnotes_known_issues>` for a list of all known issues affecting this
+  BIND 9 branch.