diff --git a/error.php b/error.php
index db6f157c47079d9be38162dc45defa802d8df0ed..c4db050d09443a948e8efc9a7ecc96b89eda8e99 100644
--- a/error.php
+++ b/error.php
@@ -11,10 +11,10 @@
 watchdog("httpd", $errors[$REDIRECT_STATUS]);
 
 if (strstr($REDIRECT_URL, "index.php")) {
-  header("Location: ../index.php");
+  drupal_goto("../index.php");
 }
 else {
-  header("Location: index.php");
+  drupal_goto("index.php");
 }
 
 ?>
\ No newline at end of file
diff --git a/includes/common.inc b/includes/common.inc
index 256beb34cd347ac11b686d40b61b658d1b3fc305..98a94b339392c6cc443190b1d6c8df3566c04c73 100644
--- a/includes/common.inc
+++ b/includes/common.inc
@@ -71,6 +71,17 @@ function message_throttle() {
   return t("You exceeded the submission rate exceeded.  Please wait a few minutes and try again.");
 }
 
+function drupal_goto($url) {
+
+  /*
+  ** It is advised to use "drupal_goto()" instead of PHP's "header()" as 
+  ** "drupal_goto()" will append the user's session ID to the URI when PHP 
+  ** is compiled with "--enable-trans-sid".
+  */
+
+  header("Location: $url". SID);
+}
+
 function check_form($text) {
   return htmlspecialchars(stripslashes($text));
 }
diff --git a/modules/queue.module b/modules/queue.module
index 3da3fcb2dbbc848e9e6473aeec7cd1d89ce8381c..676d3fc3a13b66b3c6045f7ec46a7deb3598d381 100644
--- a/modules/queue.module
+++ b/modules/queue.module
@@ -86,7 +86,7 @@ function queue_node($id) {
   $node = node_get_object(array(nid => $id));
 
   if ($user->uid == $node->author || field_get($node->users, $user->uid)) {
-    header("Location: node.php?id=$node->nid");
+    drupal_goto("node.php?id=$node->nid");
   }
   else {
     $queue_votes = array("neutral (+0)" => "+ 0", "post it (+1)" => "+ 1", "dump it (-1)" => "- 1");
diff --git a/modules/user.module b/modules/user.module
index 1ee6599b06d90b16fed0074f04a59e1f13b0e6da..5e976b61e36f491cade94bdc9e45fe4138f404e8 100644
--- a/modules/user.module
+++ b/modules/user.module
@@ -482,7 +482,7 @@ function user_login($edit = array()) {
 
       $url = $HTTP_REFERER ? $HTTP_REFERER : "module.php?mod=user&op=view";
 
-      header("Location: $url");
+      drupal_goto($url);
 
     }
     else {
@@ -529,7 +529,7 @@ function user_logout() {
     ** Redirect the user to his personal information page:
     */
 
-    header("Location: index.php");
+    drupal_goto("index.php");
   }
 }
 
@@ -688,7 +688,7 @@ function user_edit($edit = array()) {
         ** Redirect the user to his personal information page:
         */
 
-        header("Location: module.php?mod=user&op=view");
+        drupal_goto("module.php?mod=user&op=view");
       }
     }
 
diff --git a/modules/user/user.module b/modules/user/user.module
index 1ee6599b06d90b16fed0074f04a59e1f13b0e6da..5e976b61e36f491cade94bdc9e45fe4138f404e8 100644
--- a/modules/user/user.module
+++ b/modules/user/user.module
@@ -482,7 +482,7 @@ function user_login($edit = array()) {
 
       $url = $HTTP_REFERER ? $HTTP_REFERER : "module.php?mod=user&op=view";
 
-      header("Location: $url");
+      drupal_goto($url);
 
     }
     else {
@@ -529,7 +529,7 @@ function user_logout() {
     ** Redirect the user to his personal information page:
     */
 
-    header("Location: index.php");
+    drupal_goto("index.php");
   }
 }
 
@@ -688,7 +688,7 @@ function user_edit($edit = array()) {
         ** Redirect the user to his personal information page:
         */
 
-        header("Location: module.php?mod=user&op=view");
+        drupal_goto("module.php?mod=user&op=view");
       }
     }