Index: branches/version-2_4/data/class/pages/mypage/LC_Page_Mypage_Change.php
===================================================================
--- branches/version-2_4/data/class/pages/mypage/LC_Page_Mypage_Change.php	(revision 17989)
+++ branches/version-2_4/data/class/pages/mypage/LC_Page_Mypage_Change.php	(revision 18147)
@@ -452,5 +452,5 @@
                                   array($this->arrForm[$mailType]));
                 if ($email_cnt > 0){
-                    $arrMailType2[$mailTypeValue] = false;
+                    $arrMailType2[$mailType] = false;
                     $this->arrErr[$mailType] .= "既に使用されているメールアドレスです。";
                 }