diff -U 3 -d -r -N -- system-tools-backends-2.6.0/system-tools-backends.conf system-tools-backends-2.6.0.fixed/system-tools-backends.conf
--- system-tools-backends-2.6.0/system-tools-backends.conf	2008-03-09 14:21:45.000000000 +0100
+++ system-tools-backends-2.6.0.fixed/system-tools-backends.conf	2008-03-24 01:46:53.000000000 +0100
@@ -26,8 +26,8 @@
     <deny send_interface="org.freedesktop.SystemToolsBackends"/>
     <deny send_interface="org.freedesktop.SystemToolsBackends.Platform"/>
 
-    <!-- ...so petitions go through the dispatcher instead -->
-    <allow send_destination="org.freedesktop.SystemToolsBackends"/>
+    <!-- deny access to the dispatcher by default -->
+    <deny send_destination="org.freedesktop.SystemToolsBackends"/>
   </policy>
 
   <policy user="0">
@@ -51,5 +51,12 @@
          so any message to them has to go through the dispatcher -->
     <allow send_interface="org.freedesktop.SystemToolsBackends"/>
     <allow send_interface="org.freedesktop.SystemToolsBackends.Platform"/>
+    <allow send_destination="org.freedesktop.SystemToolsBackends"/>
+  </policy>
+
+  <policy group="stb-admin">
+    <!-- Members of group 'stb-admin' can access the configuration modules -->
+    <allow send_interface="org.freedesktop.SystemToolsBackends"/>
+    <allow send_destination="org.freedesktop.SystemToolsBackends"/>
   </policy>
 </busconfig>