Index: includes/common.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/common.inc,v
retrieving revision 1.532
diff -u -r1.532 common.inc
--- includes/common.inc	7 Apr 2006 15:32:17 -0000	1.532
+++ includes/common.inc	10 Apr 2006 00:45:35 -0000
@@ -227,6 +227,17 @@
 
   $url = url($path, $query, $fragment, TRUE);
 
+  if (ini_get('session.use_trans_sid') && session_id() && !strstr($url, session_id()) && !$_COOKIE[session_name()]) {
+    $sid = session_name() . '=' . session_id();
+
+    if (strstr($url, '?') && !strstr($url, $sid)) {
+      $url = $url .'&'. $sid;
+    }
+    else {
+      $url = $url .'?'. $sid;
+    }
+  }
+
   // Before the redirect, allow modules to react to the end of the page request.
   module_invoke_all('exit', $url);