diff --git a/user_manual/bookmarks.rst b/user_manual/bookmarks.rst
index 488849aa0..b61862d04 100644
--- a/user_manual/bookmarks.rst
+++ b/user_manual/bookmarks.rst
@@ -5,7 +5,7 @@ Using the Bookmarks App
 The Bookmark application allows you to bookmark Web sites inside Nextcloud.
 
 The main interface
---------------------
+------------------
 
 Add a bookmark
 ~~~~~~~~~~~~~~
diff --git a/user_manual/files/access_webdav.rst b/user_manual/files/access_webdav.rst
index 11c0af75f..338659ee0 100644
--- a/user_manual/files/access_webdav.rst
+++ b/user_manual/files/access_webdav.rst
@@ -31,8 +31,7 @@ base URL and folder only::
 
 In addition to the mobile apps provided by Nextcloud, you can use other apps to
 connect to Nextcloud from your mobile device using WebDAV. `WebDAV Navigator`_ is
-a good (proprietary) app for `Android devices`_, `iPhones`_, and `BlackBerry
-devices`_. The URL to use on these is::
+a good (proprietary) app for `Android devices`_ and `iPhones`_. The URL to use on these is::
 
     example.com/nextcloud/remote.php/dav/files/USERNAME/
 
diff --git a/user_manual/pim/sync_thunderbird.rst b/user_manual/pim/sync_thunderbird.rst
index 5634a2f41..1d4791bc8 100644
--- a/user_manual/pim/sync_thunderbird.rst
+++ b/user_manual/pim/sync_thunderbird.rst
@@ -1,8 +1,8 @@
 Thunderbird - Synchronize Addressbook
-======================================
+=====================================
 
 Addressbook
-------------
+-----------
 
 As someone who is new to Nextcloud, New to SoGo Connector, and new to Thunderbird Addressbook... here is what you need in excruciating pithy detail to make this work (for all the other lost souls out there):