diff -rpcd a/src/backend/access/transam/xlog.c b/src/backend/access/transam/xlog.c
*** a/src/backend/access/transam/xlog.c	2013-06-25 03:55:41.000000000 +0900
--- b/src/backend/access/transam/xlog.c	2013-08-01 07:19:32.599000000 +0900
*************** XLogFileRead(XLogSegNo segno, int emode,
*** 2658,2666 ****
  
  	/*
  	 * If the segment was fetched from archival storage, replace the existing
! 	 * xlog segment (if any) with the archival version.
  	 */
! 	if (source == XLOG_FROM_ARCHIVE)
  	{
  		KeepFileRestoredFromArchive(path, xlogfname);
  
--- 2658,2668 ----
  
  	/*
  	 * If the segment was fetched from archival storage, replace the existing
! 	 * xlog segment (if any) with the archival version when cascading
! 	 * replication is allowed.
  	 */
! 	if (source == XLOG_FROM_ARCHIVE &&
! 		AllowCascadeReplication())
  	{
  		KeepFileRestoredFromArchive(path, xlogfname);