-Each of these allows you to download its own source code so you
-can get both the testing and the main version of the website.
+<p>
+
+You can add the form parameter <kbd>?debug=1</kbd> to each of the
+website URLs above to get a version of the site with debugging output enabled.
+
+<h4>Database and dictionary update receiver</h4>
+
+On the live system there are different trees, potentially with
+different versions, for receiving updates and managing the database,
+to the ones for displaying the website. The database management trees
+are normally accessed only via the upload client but you may also
+download their source directly:
+
+ <ul>
+ <li><a href="http://upload.yarrg.chiark.net/commod-update-receiver?get_source=1">Main production instance</a> including uncommitted changes; or
+ <a href="git://git.yarrg.chiark.net/ypp-sc-tools.db-live.git">committed changes via git</a>
+ <li><a href="http://upload.yarrg.chiark.net/test/commod-update-receiver?get_source=1">Testing database instance</a> including uncommitted changes; or
+ <a href="git://git.yarrg.chiark.net/ypp-sc-tools.db-test.git">committed changes via git</a>
+ </ul>