Index: branches/version-2_5-dev/data/class/pages/shopping/LC_Page_Shopping_Payment.php
===================================================================
--- branches/version-2_5-dev/data/class/pages/shopping/LC_Page_Shopping_Payment.php	(revision 20344)
+++ branches/version-2_5-dev/data/class/pages/shopping/LC_Page_Shopping_Payment.php	(revision 20377)
@@ -225,4 +225,17 @@
     function destroy() {
         parent::destroy();
+    }
+
+    /**
+     * トランザクショントークンを unset しないようオーバーライド.
+     *
+     * @return void
+     */
+    function doValidToken() {
+        if ($_SERVER["REQUEST_METHOD"] == "POST") {
+            if (!SC_Helper_Session_Ex::isValidToken(false)) {
+                SC_Utils_Ex::sfDispError(INVALID_MOVE_ERRORR);
+            }
+        }
     }