diff --git a/NEWS.rst b/NEWS.rst
index 1a2f591c4..c5e9f1f81 100644
--- a/NEWS.rst
+++ b/NEWS.rst
@@ -3,6 +3,18 @@
 User-Visible Changes in Tahoe-LAFS
 ==================================
 
+Release 1.9.1 (2012-01-12)
+--------------------------
+
+Security-related Bugfix
+'''''''''''''''''''''''
+
+- Fix flaw that would allow servers to cause undetected corruption when
+  retrieving the contents of mutable files (both SDMF and MDMF). (`#1654`_)
+
+.. _`#1654`: https://tahoe-lafs.org/trac/tahoe-lafs/ticket/1654
+
+
 Release 1.9.0 (2011-10-30)
 --------------------------
 
diff --git a/relnotes.txt b/relnotes.txt
index 35fb8c680..446ff5fa4 100644
--- a/relnotes.txt
+++ b/relnotes.txt
@@ -1,8 +1,8 @@
 ANNOUNCING Tahoe, the Least-Authority File System, v1.9.1
 
-The Tahoe-LAFS team has announced the immediate availability of
-version 1.9.1 of Tahoe-LAFS, an extremely reliable distributed
-storage system. Get it here:
+The Tahoe-LAFS team is pleased to announce the immediate
+availability of version 1.9.1 of Tahoe-LAFS, an extremely
+reliable distributed storage system. Get it here:
 
 https://tahoe-lafs.org/source/tahoe-lafs/trunk/docs/quickstart.rst