diff --git a/adm/contentformupdate.php b/adm/contentformupdate.php
index ac1be285d..0c7f75e57 100644
--- a/adm/contentformupdate.php
+++ b/adm/contentformupdate.php
@@ -12,24 +12,31 @@ else
 
 check_admin_token();
 
+$co_row = array('co_id'=>'', 'co_include_head'=>'', 'co_include_tail'=>'');
+
 if ($w == "" || $w == "u")
 {
-    if(isset($_POST['co_id']) && preg_match("/[^a-z0-9_]/i", $_POST['co_id'])) alert("ID 는 영문자, 숫자, _ 만 가능합니다.");
+    if(isset($_REQUEST['co_id']) && preg_match("/[^a-z0-9_]/i", $_REQUEST['co_id'])) alert("ID 는 영문자, 숫자, _ 만 가능합니다.");
 
     $sql = " select * from {$g5['content_table']} where co_id = '$co_id' ";
     $co_row = sql_fetch($sql);
 }
 
-$co_id = isset($_POST['co_id']) ? preg_replace('/[^a-z0-9_]/i', '', $_POST['co_id']) : '';
-$co_subject = strip_tags(clean_xss_attributes($co_subject));
-$co_include_head = preg_replace(array("#[\\\]+$#", "#(<\?php|<\?)#i"), "", substr($co_include_head, 0, 255));
-$co_include_tail = preg_replace(array("#[\\\]+$#", "#(<\?php|<\?)#i"), "", substr($co_include_tail, 0, 255));
+$co_id = isset($_REQUEST['co_id']) ? preg_replace('/[^a-z0-9_]/i', '', $_REQUEST['co_id']) : '';
+$co_subject = isset($_POST['co_subject']) ? strip_tags(clean_xss_attributes($_POST['co_subject'])) : '';
+$co_include_head = isset($_POST['co_include_head']) ? preg_replace(array("#[\\\]+$#", "#(<\?php|<\?)#i"), "", substr($_POST['co_include_head'], 0, 255)) : '';
+$co_include_tail = isset($_POST['co_include_tail']) ? preg_replace(array("#[\\\]+$#", "#(<\?php|<\?)#i"), "", substr($_POST['co_include_tail'], 0, 255)) : '';
 $co_tag_filter_use = isset($_POST['co_tag_filter_use']) ? (int) $_POST['co_tag_filter_use'] : 1;
 $co_himg_del = (isset($_POST['co_himg_del']) && $_POST['co_himg_del']) ? 1 : 0;
 $co_timg_del = (isset($_POST['co_timg_del']) && $_POST['co_timg_del']) ? 1 : 0;
+$co_html = isset($_POST['co_html']) ? (int) $_POST['co_html'] : 0;
+$co_content = isset($_POST['co_content']) ? $_POST['co_content'] : '';
+$co_mobile_content = isset($_POST['co_mobile_content']) ? $_POST['co_mobile_content'] : '';
+$co_skin = isset($_POST['co_skin']) ? clean_xss_tags($_POST['co_skin'], 1, 1) : '';
+$co_mobile_skin = isset($_POST['co_mobile_skin']) ? clean_xss_tags($_POST['co_mobile_skin'], 1, 1) : '';
 
 // 관리자가 자동등록방지를 사용해야 할 경우
-if (($co_row['co_include_head'] !== $co_include_head || $co_row['co_include_tail'] !== $co_include_tail) && function_exists('get_admin_captcha_by') && get_admin_captcha_by()){
+if ((( isset($co_row['co_include_head']) && $co_row['co_include_head'] !== $co_include_head ) || ( isset($co_row['co_include_tail']) && $co_row['co_include_tail'] !== $co_include_tail )) && function_exists('get_admin_captcha_by') && get_admin_captcha_by()){
     include_once(G5_CAPTCHA_PATH.'/captcha.lib.php');
 
     if (!chk_captcha()) {
@@ -94,7 +101,7 @@ $sql_common = " co_include_head     = '$co_include_head',
 if ($w == "")
 {
     $row = $co_row;
-    if ($row['co_id'])
+    if (isset($row['co_id']) && $row['co_id'])
         alert("이미 같은 ID로 등록된 내용이 있습니다.");
 
     $sql = " insert {$g5['content_table']}
diff --git a/bbs/content.php b/bbs/content.php
index 40ab666d6..2b53a3b85 100644
--- a/bbs/content.php
+++ b/bbs/content.php
@@ -2,6 +2,7 @@
 include_once('./_common.php');
 
 $co_id = isset($_GET['co_id']) ? preg_replace('/[^a-z0-9_]/i', '', $_GET['co_id']) : 0;
+$co_seo_title = isset($_GET['co_seo_title']) ? clean_xss_tags($_GET['co_seo_title'], 1, 1) : '';
 
 //dbconfig파일에 $g5['content_table'] 배열변수가 있는지 체크
 if( !isset($g5['content_table']) ){
@@ -25,7 +26,7 @@ if (G5_IS_MOBILE) {
     return;
 }
 
-if (!$co['co_id'])
+if (! (isset($co['co_id']) && $co['co_id']))
     alert('등록된 내용이 없습니다.');
 
 $g5['title'] = $co['co_subject'];
@@ -45,29 +46,29 @@ $src[] = "/{{쇼핑몰명}}|{{홈페이지제목}}/";
 $dst[] = $config['cf_title'];
 if(isset($default) && isset($default['de_admin_company_name'])){
     $src[] = "/{{회사명}}|{{상호}}/";
-    $dst[] = $default['de_admin_company_name'];
+    $dst[] = isset($default['de_admin_company_name']) ? $default['de_admin_company_name'] : '';
     $src[] = "/{{대표자명}}/";
-    $dst[] = $default['de_admin_company_owner'];
+    $dst[] = isset($default['de_admin_company_owner']) ? $default['de_admin_company_owner'] : '';
     $src[] = "/{{사업자등록번호}}/";
-    $dst[] = $default['de_admin_company_saupja_no'];
+    $dst[] = isset($default['de_admin_company_saupja_no']) ? $default['de_admin_company_saupja_no'] : '';
     $src[] = "/{{대표전화번호}}/";
-    $dst[] = $default['de_admin_company_tel'];
+    $dst[] = isset($default['de_admin_company_tel']) ? $default['de_admin_company_tel'] : '';
     $src[] = "/{{팩스번호}}/";
-    $dst[] = $default['de_admin_company_fax'];
+    $dst[] = isset($default['de_admin_company_fax']) ? $default['de_admin_company_fax'] : '';
     $src[] = "/{{통신판매업신고번호}}/";
-    $dst[] = $default['de_admin_company_tongsin_no'];
+    $dst[] = isset($default['de_admin_company_tongsin_no']) ? $default['de_admin_company_tongsin_no'] : '';
     $src[] = "/{{사업장우편번호}}/";
-    $dst[] = $default['de_admin_company_zip'];
+    $dst[] = isset($default['de_admin_company_zip']) ? $default['de_admin_company_zip'] : '';
     $src[] = "/{{사업장주소}}/";
-    $dst[] = $default['de_admin_company_addr'];
+    $dst[] = isset($default['de_admin_company_addr']) ? $default['de_admin_company_addr'] : '';
     $src[] = "/{{운영자명}}|{{관리자명}}/";
-    $dst[] = $default['de_admin_name'];
+    $dst[] = isset($default['de_admin_name']) ? $default['de_admin_name'] : '';
     $src[] = "/{{운영자e-mail}}|{{관리자e-mail}}/i";
-    $dst[] = $default['de_admin_email'];
+    $dst[] = isset($default['de_admin_email']) ? $default['de_admin_email'] : '';
     $src[] = "/{{정보관리책임자명}}/";
-    $dst[] = $default['de_admin_info_name'];
+    $dst[] = isset($default['de_admin_info_name']) ? $default['de_admin_info_name'] : '';
     $src[] = "/{{정보관리책임자e-mail}}|{{정보책임자e-mail}}/i";
-    $dst[] = $default['de_admin_info_email'];
+    $dst[] = isset($default['de_admin_info_email']) ? $default['de_admin_info_email'] : '';
 }
 $str = preg_replace($src, $dst, $str);
 
diff --git a/config.php b/config.php
index cff134502..24025943a 100644
--- a/config.php
+++ b/config.php
@@ -5,8 +5,8 @@
 ********************/
 
 define('G5_VERSION', '그누보드5');
-define('G5_GNUBOARD_VER', '5.4.4');
-define('G5_YOUNGCART_VER', '5.4.4');
+define('G5_GNUBOARD_VER', '5.4.4.1');
+define('G5_YOUNGCART_VER', '5.4.4.1');
 
 // 이 상수가 정의되지 않으면 각각의 개별 페이지는 별도로 실행될 수 없음
 define('_GNUBOARD_', true);
diff --git a/extend/debugbar.extend.php b/extend/debugbar.extend.php
index 2d49596ed..e1a51637a 100644
--- a/extend/debugbar.extend.php
+++ b/extend/debugbar.extend.php
@@ -14,7 +14,7 @@ function show_debug_bar() {
     }
 
     $memory_usage = function_exists( 'memory_get_peak_usage' ) ? memory_get_peak_usage() : memory_get_usage();
-    $php_run_time = get_microtime()-$g5_debug['php']['begin_time'];
+    $php_run_time = (isset($g5_debug['php']) && isset($g5_debug['php']['begin_time'])) ? ( get_microtime() - $g5_debug['php']['begin_time'] ) : 0;
 
     include_once( G5_PLUGIN_PATH.'/debugbar/debugbar.php' );
 }
\ No newline at end of file
diff --git a/head.sub.php b/head.sub.php
index fecc36c04..d6ac73d74 100644
--- a/head.sub.php
+++ b/head.sub.php
@@ -15,8 +15,8 @@ if (!isset($g5['title'])) {
     $g5_head_title = $g5['title'];
 }
 else {
-    $g5_head_title = $g5['title']; // 상태바에 표시될 제목
-    $g5_head_title .= " | ".$config['cf_title'];
+    // 상태바에 표시될 제목
+    $g5_head_title = implode(' | ', array_filter(array('', $config['cf_title'])));
 }
 
 $g5['title'] = strip_tags($g5['title']);
diff --git a/lib/common.lib.php b/lib/common.lib.php
index 19e71a8c3..b8e328045 100644
--- a/lib/common.lib.php
+++ b/lib/common.lib.php
@@ -1644,6 +1644,8 @@ function sql_fetch($sql, $error=G5_DISPLAY_SQL_ERROR, $link=null)
 // 결과값에서 한행 연관배열(이름으로)로 얻는다.
 function sql_fetch_array($result)
 {
+    if( ! $result) return array();
+
     if(function_exists('mysqli_fetch_assoc') && G5_MYSQLI_USE)
         $row = @mysqli_fetch_assoc($result);
     else
diff --git a/mobile/content.php b/mobile/content.php
index 701ca3e60..21f7f0132 100644
--- a/mobile/content.php
+++ b/mobile/content.php
@@ -16,29 +16,29 @@ $src[] = "/{{쇼핑몰명}}|{{홈페이지제목}}/";
 $dst[] = $config['cf_title'];
 if(isset($default) && isset($default['de_admin_company_name'])){
     $src[] = "/{{회사명}}|{{상호}}/";
-    $dst[] = $default['de_admin_company_name'];
+    $dst[] = isset($default['de_admin_company_name']) ? $default['de_admin_company_name'] : '';
     $src[] = "/{{대표자명}}/";
-    $dst[] = $default['de_admin_company_owner'];
+    $dst[] = isset($default['de_admin_company_owner']) ? $default['de_admin_company_owner'] : '';
     $src[] = "/{{사업자등록번호}}/";
-    $dst[] = $default['de_admin_company_saupja_no'];
+    $dst[] = isset($default['de_admin_company_saupja_no']) ? $default['de_admin_company_saupja_no'] : '';
     $src[] = "/{{대표전화번호}}/";
-    $dst[] = $default['de_admin_company_tel'];
+    $dst[] = isset($default['de_admin_company_tel']) ? $default['de_admin_company_tel'] : '';
     $src[] = "/{{팩스번호}}/";
-    $dst[] = $default['de_admin_company_fax'];
+    $dst[] = isset($default['de_admin_company_fax']) ? $default['de_admin_company_fax'] : '';
     $src[] = "/{{통신판매업신고번호}}/";
-    $dst[] = $default['de_admin_company_tongsin_no'];
+    $dst[] = isset($default['de_admin_company_tongsin_no']) ? $default['de_admin_company_tongsin_no'] : '';
     $src[] = "/{{사업장우편번호}}/";
-    $dst[] = $default['de_admin_company_zip'];
+    $dst[] = isset($default['de_admin_company_zip']) ? $default['de_admin_company_zip'] : '';
     $src[] = "/{{사업장주소}}/";
-    $dst[] = $default['de_admin_company_addr'];
+    $dst[] = isset($default['de_admin_company_addr']) ? $default['de_admin_company_addr'] : '';
     $src[] = "/{{운영자명}}|{{관리자명}}/";
-    $dst[] = $default['de_admin_name'];
+    $dst[] = isset($default['de_admin_name']) ? $default['de_admin_name'] : '';
     $src[] = "/{{운영자e-mail}}|{{관리자e-mail}}/i";
-    $dst[] = $default['de_admin_email'];
+    $dst[] = isset($default['de_admin_email']) ? $default['de_admin_email'] : '';
     $src[] = "/{{정보관리책임자명}}/";
-    $dst[] = $default['de_admin_info_name'];
+    $dst[] = isset($default['de_admin_info_name']) ? $default['de_admin_info_name'] : '';
     $src[] = "/{{정보관리책임자e-mail}}|{{정보책임자e-mail}}/i";
-    $dst[] = $default['de_admin_info_email'];
+    $dst[] = isset($default['de_admin_info_email']) ? $default['de_admin_info_email'] : '';
 }
 $str = preg_replace($src, $dst, $str);
 
diff --git a/theme/basic/head.sub.php b/theme/basic/head.sub.php
index 776b9d252..ea04734c8 100644
--- a/theme/basic/head.sub.php
+++ b/theme/basic/head.sub.php
@@ -9,8 +9,8 @@ if (!isset($g5['title'])) {
     $g5_head_title = $g5['title'];
 }
 else {
-    $g5_head_title = $g5['title']; // 상태바에 표시될 제목
-    $g5_head_title .= " | ".$config['cf_title'];
+    // 상태바에 표시될 제목
+    $g5_head_title = implode(' | ', array_filter(array($g5['title'], $config['cf_title'])));
 }
 
 $g5['title'] = strip_tags($g5['title']);