diff --git a/adm/config_form.php b/adm/config_form.php
index 34d49e7c1..7b7de39ff 100644
--- a/adm/config_form.php
+++ b/adm/config_form.php
@@ -375,19 +375,19 @@ $pg_anchor = '<ul class="anchor">
             <th scope="row"><label for="cf_possible_ip">접근가능 IP</label></th>
             <td>
                 <?php echo help('입력된 IP의 컴퓨터만 접근할 수 있습니다.<br>123.123.+ 도 입력 가능. (엔터로 구분)') ?>
-                <textarea name="cf_possible_ip" id="cf_possible_ip"><?php echo $config['cf_possible_ip'] ?> </textarea>
+                <textarea name="cf_possible_ip" id="cf_possible_ip"><?php echo $config['cf_possible_ip'] ?></textarea>
             </td>
             <th scope="row"><label for="cf_intercept_ip">접근차단 IP</label></th>
             <td>
                 <?php echo help('입력된 IP의 컴퓨터는 접근할 수 없음.<br>123.123.+ 도 입력 가능. (엔터로 구분)') ?>
-                <textarea name="cf_intercept_ip" id="cf_intercept_ip"><?php echo $config['cf_intercept_ip'] ?> </textarea>
+                <textarea name="cf_intercept_ip" id="cf_intercept_ip"><?php echo $config['cf_intercept_ip'] ?></textarea>
             </td>
         </tr>
         <tr>
             <th scope="row"><label for="cf_analytics">방문자분석 스크립트</label></th>
             <td colspan="3">
                 <?php echo help('방문자분석 스크립트 코드를 입력합니다. 예) 구글 애널리스틱'); ?>
-                <textarea name="cf_analytics" id="cf_analytics"><?php echo $config['cf_analytics']; ?> </textarea>
+                <textarea name="cf_analytics" id="cf_analytics"><?php echo $config['cf_analytics']; ?></textarea>
             </td>
         </tr>
         </tbody>
@@ -467,7 +467,7 @@ $pg_anchor = '<ul class="anchor">
             <th scope="row"><label for="cf_filter">단어 필터링</label></th>
             <td colspan="3">
                 <?php echo help('입력된 단어가 포함된 내용은 게시할 수 없습니다. 단어와 단어 사이는 ,로 구분합니다.') ?>
-                <textarea name="cf_filter" id="cf_filter" rows="7"><?php echo $config['cf_filter'] ?> </textarea>
+                <textarea name="cf_filter" id="cf_filter" rows="7"><?php echo $config['cf_filter'] ?></textarea>
              </td>
         </tr>
         </tbody>
@@ -613,7 +613,7 @@ $pg_anchor = '<ul class="anchor">
         </tr>
         <tr>
             <th scope="row"><label for="cf_privacy">개인정보취급방침</label></th>
-            <td colspan="3"><textarea id="cf_privacy" name="cf_privacy" rows="10"><?php echo $config['cf_privacy'] ?> </textarea></td>
+            <td colspan="3"><textarea id="cf_privacy" name="cf_privacy" rows="10"><?php echo $config['cf_privacy'] ?></textarea></td>
         </tr>
         </tbody>
         </table>
diff --git a/common.php b/common.php
index cc0d8879a..e642cfa11 100644
--- a/common.php
+++ b/common.php
@@ -95,6 +95,7 @@ if (file_exists($dbconfig_file)) {
     $connect_db = sql_connect(G5_MYSQL_HOST, G5_MYSQL_USER, G5_MYSQL_PASSWORD) or die('MySQL Connect Error!!!');
     $select_db  = sql_select_db(G5_MYSQL_DB, $connect_db) or die('MySQL DB Error!!!');
     @mysql_query(" set names utf8 ");
+    if(defined('G5_MYSQL_SET_MODE') && G5_MYSQL_SET_MODE) @mysql_query("SET SESSION sql_mode = ''");
     if (defined(G5_TIMEZONE)) @mysql_query(" set time_zone = '".G5_TIMEZONE."'");
 } else {
 ?>
diff --git a/install/install_db.php b/install/install_db.php
index c10009d41..e4cfe29f0 100644
--- a/install/install_db.php
+++ b/install/install_db.php
@@ -23,7 +23,6 @@ $admin_pass  = $_POST['admin_pass'];
 $admin_name  = $_POST['admin_name'];
 $admin_email = $_POST['admin_email'];
 
-@mysql_query('set names utf8');
 $dblink = @mysql_connect($mysql_host, $mysql_user, $mysql_pass);
 if (!$dblink) {
     echo '<meta http-equiv="content-type" content="text/html; charset=utf-8">'.PHP_EOL;
@@ -32,7 +31,6 @@ if (!$dblink) {
     exit;
 }
 
-@mysql_query('set names utf8');
 $select_db = @mysql_select_db($mysql_db, $dblink);
 if (!$select_db) {
     echo '<meta http-equiv="content-type" content="text/html; charset=utf-8">'.PHP_EOL;
@@ -40,6 +38,13 @@ if (!$select_db) {
     echo '<div><a href="./install_config.php">뒤로가기</a></div>'.PHP_EOL;
     exit;
 }
+
+$mysql_set_mode = 'false';
+@mysql_query('set names utf8');
+if(version_compare(mysql_get_server_info(), '5.6.6', '>=')  == 1) {
+    @mysql_query("SET SESSION sql_mode = ''");
+    $mysql_set_mode = 'true';
+}
 ?>
 
 <h2><?php echo G5_VERSION ?> 설치가 시작되었습니다.</h2>
@@ -186,7 +191,8 @@ fwrite($f, "if (!defined('_GNUBOARD_')) exit;\n");
 fwrite($f, "define('G5_MYSQL_HOST', '{$mysql_host}');\n");
 fwrite($f, "define('G5_MYSQL_USER', '{$mysql_user}');\n");
 fwrite($f, "define('G5_MYSQL_PASSWORD', '{$mysql_pass}');\n");
-fwrite($f, "define('G5_MYSQL_DB', '{$mysql_db}');\n\n");
+fwrite($f, "define('G5_MYSQL_DB', '{$mysql_db}');\n");
+fwrite($f, "define('G5_MYSQL_SET_MODE', {$mysql_set_mode});\n\n");
 fwrite($f, "define('G5_TABLE_PREFIX', '{$table_prefix}');\n\n");
 fwrite($f, "\$g5['write_prefix'] = G5_TABLE_PREFIX.'write_'; // 게시판 테이블명 접두사\n\n");
 fwrite($f, "\$g5['auth_table'] = G5_TABLE_PREFIX.'auth'; // 관리권한 설정 테이블\n");
diff --git a/mobile/skin/board/basic/list.skin.php b/mobile/skin/board/basic/list.skin.php
index 01c2d759a..941aa8cf2 100644
--- a/mobile/skin/board/basic/list.skin.php
+++ b/mobile/skin/board/basic/list.skin.php
@@ -194,6 +194,9 @@ function fboardlist_submit(f) {
     if(document.pressed == "선택삭제") {
         if (!confirm("선택한 게시물을 정말 삭제하시겠습니까?\n\n한번 삭제한 자료는 복구할 수 없습니다"))
             return false;
+
+        f.removeAttribute("target");
+        f.action = "./board_list_update.php";
     }
 
     return true;
diff --git a/mobile/skin/board/gallery/list.skin.php b/mobile/skin/board/gallery/list.skin.php
index 71d709dbe..f131a3af5 100644
--- a/mobile/skin/board/gallery/list.skin.php
+++ b/mobile/skin/board/gallery/list.skin.php
@@ -218,6 +218,9 @@ function fboardlist_submit(f) {
     if(document.pressed == "선택삭제") {
         if (!confirm("선택한 게시물을 정말 삭제하시겠습니까?\n\n한번 삭제한 자료는 복구할 수 없습니다"))
             return false;
+
+        f.removeAttribute("target");
+        f.action = "./board_list_update.php";
     }
 
     return true;
diff --git a/skin/board/basic/list.skin.php b/skin/board/basic/list.skin.php
index 209879558..c497db765 100644
--- a/skin/board/basic/list.skin.php
+++ b/skin/board/basic/list.skin.php
@@ -223,6 +223,9 @@ function fboardlist_submit(f) {
     if(document.pressed == "선택삭제") {
         if (!confirm("선택한 게시물을 정말 삭제하시겠습니까?\n\n한번 삭제한 자료는 복구할 수 없습니다"))
             return false;
+
+        f.removeAttribute("target");
+        f.action = "./board_list_update.php";
     }
 
     return true;
diff --git a/skin/board/gallery/list.skin.php b/skin/board/gallery/list.skin.php
index b88a9771f..3f8a5878c 100644
--- a/skin/board/gallery/list.skin.php
+++ b/skin/board/gallery/list.skin.php
@@ -217,6 +217,9 @@ function fboardlist_submit(f) {
     if(document.pressed == "선택삭제") {
         if (!confirm("선택한 게시물을 정말 삭제하시겠습니까?\n\n한번 삭제한 자료는 복구할 수 없습니다"))
             return false;
+
+        f.removeAttribute("target");
+        f.action = "./board_list_update.php";
     }
 
     return true;