Index: admin/index.php
===================================================================
RCS file: /cvsroot/moodle/moodle/admin/index.php,v
retrieving revision 1.435
diff -u -r1.435 index.php
--- admin/index.php	19 Oct 2010 10:17:48 -0000	1.435
+++ admin/index.php	25 Oct 2010 10:40:21 -0000
@@ -111,7 +111,9 @@
 
 if (!core_tables_exist()) {
     $PAGE->set_pagelayout('maintenance');
+    define('MESSAGE_WINDOW', true);
 
+    
     // fake some settings
     $CFG->docroot = 'http://docs.moodle.org';
 
@@ -193,6 +195,7 @@
 
 if ($version > $CFG->version) {  // upgrade
     $PAGE->set_pagelayout('maintenance');
+    define('MESSAGE_WINDOW', true);
 
     $a->oldversion = "$CFG->release ($CFG->version)";
     $a->newversion = "$release ($version)";
@@ -276,6 +279,7 @@
         // means core upgrade or installation was not already done
         if (!$confirmplugins) {
             $PAGE->set_pagelayout('maintenance');
+            define('MESSAGE_WINDOW', true);
             $strplugincheck = get_string('plugincheck');
             $PAGE->navbar->add($strplugincheck);
             $PAGE->set_title($strplugincheck);