ご丁寧にありがとうございます。

サーバのerror.logを見ると、いろいろある中から、
購入テスト行った時間帯にこのようなものが記載ありました。

[Tue Nov 06 22:26:44 2012] [error] [client ××.××.××.××] PHP Warning: Call-time pass-by-reference has been deprecated in /var/www/vhosts/△△△.jp/subdomains/shop/httpdocs/data_shop/downloads/plugin/BannerAsYouLike/BannerAsYouLike.php on line 314, referer: http://shop.△△△.jp/shopping/confirm.php?transactionid=9570badebac1f0cdecfa6eb71899c0fa747b1e13

[Tue Nov 06 22:26:49 2012] [error] [client ××.××.××.××] File does not exist: /var/www/vhosts/△△△.jp/subdomains/shop/httpdocs/favicon.ico
[Tue Nov 06 22:26:49 2012] [error] [client ××.××.××.××] PHP Warning: Call-time pass-by-reference has been deprecated in /var/www/vhosts/△△△.jp/subdomains/shop/httpdocs/data_shop/downloads/plugin/DormantCategory/DormantCategory.php on line 294
[Tue Nov 06 22:26:49 2012] [error] [client ××.××.××.××] PHP Warning: Call-time pass-by-reference has been deprecated in /var/www/vhosts/△△△.jp/subdomains/shop/httpdocs/data_shop/downloads/plugin/DormantCategory/DormantCategory.php on line 305
[Tue Nov 06 22:26:49 2012] [error] [client ××.××.××.××] PHP Warning: Call-time pass-by-reference has been deprecated in /var/www/vhosts/△△△.jp/subdomains/shop/httpdocs/data_shop/downloads/plugin/DormantCategory/DormantCategory.php on line 556
[Tue Nov 06 22:26:49 2012] [error] [client ××.××.××.××] PHP Warning: Call-time pass-by-reference has been deprecated in /var/www/vhosts/△△△.jp/subdomains/shop/httpdocs/data_shop/downloads/plugin/DormantCategory/DormantCategory.php on line 675
[Tue Nov 06 22:26:49 2012] [error] [client ××.××.××.××] PHP Warning: Call-time pass-by-reference has been deprecated in /var/www/vhosts/△△△.jp/subdomains/shop/httpdocs/data_shop/downloads/plugin/DormantCategory/DormantCategory.php on line 675
[Tue Nov 06 22:26:49 2012] [error] [client ××.××.××.××] PHP Warning: Call-time pass-by-reference has been deprecated in /var/www/vhosts/△△△.jp/subdomains/shop/httpdocs/data_shop/downloads/plugin/BannerAsYouLike/BannerAsYouLike.php on line 314
[Tue Nov 06 22:26:49 2012] [error] [client ××.××.××.××] PHP Warning: Call-time pass-by-reference has been deprecated in /var/www/vhosts/△△△.jp/subdomains/shop/httpdocs/data_shop/downloads/plugin/BannerAsYouLike/BannerAsYouLike.php on line 314
[Tue Nov 06 22:26:49 2012] [error] [client ××.××.××.××] PHP Warning: Call-time pass-by-reference has been deprecated in /var/www/vhosts/△△△.jp/subdomains/shop/httpdocs/data_shop/downloads/plugin/BannerAsYouLike/plg_BannerAsYouLike_SC_View.php on line 90
[Tue Nov 06 22:26:49 2012] [error] [client ××.××.××.××] PHP Catchable fatal error: Argument 2 passed to DormantCategory::formParamConstruct() must be an instance of SC_FormParam_Ex, instance of SC_FormParam given in /var/www/vhosts/△△△.jp/subdomains/shop/httpdocs/data_shop/downloads/plugin/DormantCategory/DormantCategory.php on line 608




これは、モジュールのphpがおかしいという事でしょうか？

paypalに問い合わせると、やはりSSLはなくても使えるとの事でした。。
毎度ご迷惑おかけいたしますが、よろしくお願いいたします。