diff --git a/INSTALL b/INSTALL
index 480aefc98..2fac0db39 100644
--- a/INSTALL
+++ b/INSTALL
@@ -208,6 +208,17 @@ requires a migration.
    Before executing a schema/data migration, I recommend that you make
    a copy of your existing database.
 
+0.8.6.1: maintenance release
+----------------------------
+
+#. If you have tried to create a new mailbox and if you have
+   encountered the following `issue
+   <http://dev.modoboa.org/ticket/163>`_, you must run the
+   ``dbcleanup.py`` script in order to remove orphan records::
+
+    $ cd <modoboa_dir>
+    $ PYTHONPATH=$PWD/.. DJANGO_SETTINGS_MODULE=modoboa.settings ./admin/scripts/dbcleanup.py
+
 0.8.6: Quarantine plugin refactoring (using Django's ORM)
 ---------------------------------------------------------
 
diff --git a/doc/conf.py b/doc/conf.py
index 17d82543b..f8536e9f9 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -48,9 +48,9 @@ copyright = u'2011, Antoine Nguyen'
 # built documents.
 #
 # The short X.Y version.
-version = '0.8.6'
+version = '0.8.6.1'
 # The full version, including alpha/beta/rc tags.
-release = '0.8.6'
+release = '0.8.6.1'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.