Index: checkout.module
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/checkout/checkout.module,v
retrieving revision 1.11.2.2
diff -u -p -r1.11.2.2 checkout.module
--- checkout.module	11 Jul 2008 22:09:41 -0000	1.11.2.2
+++ checkout.module	11 Jul 2008 22:23:24 -0000
@@ -193,11 +193,18 @@ function checkout_handle_request($uid) {
   if ($referer) {
     $referer = drupal_get_normal_path(trim($referer, '/'));
   }
+
+  // If refering and current paths match we can abort, since there can't be any
+  // locking action involved.
+  if ($_GET['q'] == $referer) {
+    return;
+  }
+
+  // Otherwise try to extract nid from path.
   $previous_nid = checkout_get_nid($referer);
   $current_nid = checkout_get_nid($_GET['q']);
 
-  // Check whether to release a previously edited node. Don't release if the
-  // node edit page has just been reloaded.
+  // Check whether to release a previously edited node.
   if ($previous_nid && (!$current_nid || $current_nid != $previous_nid)) {
     checkout_release($previous_nid, $uid);
   }