diff -uNdr drupal-5.7.old/cron.php drupal-5.7/cron.php
--- drupal-5.7.old/cron.php	2006-08-09 09:42:55.000000000 +0200
+++ drupal-5.7/cron.php	2008-02-16 15:50:48.000000000 +0100
@@ -1,3 +1,4 @@
+#!/usr/bin/php
 <?php
 // $Id$
 
@@ -6,6 +7,13 @@
  * Handles incoming requests to fire off regularly-scheduled tasks (cron jobs).
  */
 
+// If not in 'safe mode', increase the memory limit
+if (!ini_get('safe_mode')) {
+  ini_set('memory_limit', '20M');
+}
+
+chdir(dirname(__FILE__));
+
 include_once './includes/bootstrap.inc';
 drupal_bootstrap(DRUPAL_BOOTSTRAP_FULL);
 drupal_cron_run();
diff -uNdr drupal-5.7.old/includes/bootstrap.inc drupal-5.7/includes/bootstrap.inc
--- drupal-5.7.old/includes/bootstrap.inc	2008-01-10 23:14:24.000000000 +0100
+++ drupal-5.7/includes/bootstrap.inc	2008-02-16 16:02:23.000000000 +0100
@@ -201,7 +201,7 @@
 
   $confdir = 'sites';
   $uri = explode('/', $_SERVER['SCRIPT_NAME'] ? $_SERVER['SCRIPT_NAME'] : $_SERVER['SCRIPT_FILENAME']);
-  $server = explode('.', implode('.', array_reverse(explode(':', rtrim($_SERVER['HTTP_HOST'], '.')))));
+  $server = explode('.', implode('.', array_reverse(explode(':', rtrim(@$_SERVER['HTTP_HOST'], '.')))));
   for ($i = count($uri) - 1; $i > 0; $i--) {
     for ($j = count($server); $j > 0; $j--) {
       $dir = implode('.', array_slice($server, -$j)) . implode('.', array_slice($uri, 0, $i));
@@ -240,7 +240,7 @@
   global $db_url, $db_prefix, $cookie_domain, $conf, $installed_profile;
   $conf = array();
 
-  include_once './'. conf_path() .'/settings.php';
+  include_once conf_path() .'/settings.php';
 
   if (isset($base_url)) {
     // Parse fixed base URL from settings.php.
@@ -258,7 +258,7 @@
 
     // As $_SERVER['HTTP_HOST'] is user input, ensure it only contains
     // characters allowed in hostnames.
-    $base_url = $base_root .= '://'. preg_replace('/[^a-z0-9-:._]/i', '', $_SERVER['HTTP_HOST']);
+    $base_url = $base_root .= '://'. preg_replace('/[^a-z0-9-:._]/i', '', @$_SERVER['HTTP_HOST']);
 
     // $_SERVER['SCRIPT_NAME'] can, in contrast to $_SERVER['PHP_SELF'], not
     // be modified by a visitor.
@@ -886,7 +886,7 @@
 
     case DRUPAL_BOOTSTRAP_ACCESS:
       // Deny access to hosts which were banned - t() is not yet available.
-      if (drupal_is_denied('host', $_SERVER['REMOTE_ADDR'])) {
+      if (drupal_is_denied('host', @$_SERVER['REMOTE_ADDR'])) {
         header('HTTP/1.1 403 Forbidden');
         print 'Sorry, '. $_SERVER['REMOTE_ADDR']. ' has been banned.';
         exit();