自動送信メール等の件名が、Windows Live メールで表示されないことがあるようです。
その解決策
■data/Smarty/templates/default/mail_templates/mail_title.tpl
【】 の上の改行（空白行）を削除します。
【変更前】
<!--{*
/*
* This file is part of EC-CUBE
*
* Copyright(c) 2000-2012 LOCKON CO.,LTD. All Rights Reserved.
*
* http://www.lockon.co.jp/
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
*}-->
【<!--{$tpl_shopname}-->】 <!--{$tpl_mailtitle}-->
【変更後】
<!--{*
/*
* This file is part of EC-CUBE
*
* Copyright(c) 2000-2012 LOCKON CO.,LTD. All Rights Reserved.
*
* http://www.lockon.co.jp/
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
*}-->
【<!--{$tpl_shopname}-->】 <!--{$tpl_mailtitle}-->
