Index: /branches/version-2_11-dev/html/install/index.php
===================================================================
--- /branches/version-2_11-dev/html/install/index.php	(revision 21237)
+++ /branches/version-2_11-dev/html/install/index.php	(revision 21241)
@@ -230,5 +230,7 @@
         }
 
-        $req->addPostDataArray($arrSendData);
+        foreach ($arrSendData as $key => $val) {
+            $req->addPostData($key, $val);
+        }
 
         if (!PEAR::isError($req->sendRequest())) {
Index: /branches/version-2_11-dev/data/class/util/SC_Utils.php
===================================================================
--- /branches/version-2_11-dev/data/class/util/SC_Utils.php	(revision 21237)
+++ /branches/version-2_11-dev/data/class/util/SC_Utils.php	(revision 21241)
@@ -1295,5 +1295,7 @@
 
         // POSTデータ送信
-        $req->addPostDataArray($arrData);
+        foreach ($arrData as $key => $val) {
+            $req->addPostData($key, $val);
+        }
 
         // エラーが無ければ、応答情報を取得する
Index: /branches/version-2_11-dev/data/class/pages/upgrade/LC_Page_Upgrade_Base.php
===================================================================
--- /branches/version-2_11-dev/data/class/pages/upgrade/LC_Page_Upgrade_Base.php	(revision 21237)
+++ /branches/version-2_11-dev/data/class/pages/upgrade/LC_Page_Upgrade_Base.php	(revision 21241)
@@ -61,5 +61,7 @@
         $objReq->setMethod('POST');
         $objReq->addPostData('mode', $mode);
-        $objReq->addPostDataArray($arrParams);
+        foreach ($arrParams as $key => $val) {
+            $objReq->addPostData($key, $val);
+        }
 
         foreach ($arrCookies as $cookie) {