Index: bootstrap.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/bootstrap.inc,v
retrieving revision 1.100
diff -u -p -r1.100 bootstrap.inc
--- bootstrap.inc       14 Jun 2006 14:01:12 -0000      1.100
+++ bootstrap.inc       21 Jun 2006 09:53:45 -0000
@@ -382,7 +382,16 @@ function drupal_load($type, $name) {
  * @see page_set_cache
  */
 function drupal_page_header() {
-  if (variable_get('cache', 0)) {
+  global $user;
+
+  if (isset($user->uid) && $user->uid > 0) {
+      header("Expires: Sun, 19 Nov 1978 05:00:00 GMT");
+      header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
+      header("Cache-Control: no-store, no-cache, must-revalidate");
+      header("Cache-Control: post-check=0, pre-check=0", false);
+      header("Pragma: no-cache");
+  }
+  elseif (variable_get('cache', 0)) {
     if ($cache = page_get_cache()) {
       bootstrap_invoke_all('init');
       // Set default values: