diff --git a/bbs/db_table.optimize.php b/bbs/db_table.optimize.php
index 828923029..97a2fd8fa 100644
--- a/bbs/db_table.optimize.php
+++ b/bbs/db_table.optimize.php
@@ -53,7 +53,7 @@ if($config['cf_leave_day'] > 0) {
 }
 
 // 음성 캡챠 파일 삭제
-$captcha_mp3 = glob(G5_PATH.'/data/cache/kcaptcha-*.mp3');
+$captcha_mp3 = glob(G5_DATA_PATH.'/cache/kcaptcha-*.mp3');
 if($captcha_mp3 && is_array($captcha_mp3)) {
     foreach ($captcha_mp3 as $file) {
         if (filemtime($file) + 86400 < G5_SERVER_TIME) {
diff --git a/bbs/download.php b/bbs/download.php
index e4f7fa3fe..2b2aa1f2b 100644
--- a/bbs/download.php
+++ b/bbs/download.php
@@ -108,17 +108,17 @@ run_event('download_file_header', $file, $file_exist_check);
 
 if(preg_match("/msie/i", $_SERVER['HTTP_USER_AGENT']) && preg_match("/5\.5/", $_SERVER['HTTP_USER_AGENT'])) {
     header("content-type: doesn/matter");
-    header("content-length: ".filesize("$filepath"));
+    header("content-length: ".filesize($filepath));
     header("content-disposition: attachment; filename=\"$original\"");
     header("content-transfer-encoding: binary");
 } else if (preg_match("/Firefox/i", $_SERVER['HTTP_USER_AGENT'])){
     header("content-type: file/unknown");
-    header("content-length: ".filesize("$filepath"));
+    header("content-length: ".filesize($filepath));
     header("content-disposition: attachment; filename=\"".basename($file['bf_source'])."\"");
     header("content-description: php generated data");
 } else {
     header("content-type: file/unknown");
-    header("content-length: ".filesize("$filepath"));
+    header("content-length: ".filesize($filepath));
     header("content-disposition: attachment; filename=\"$original\"");
     header("content-description: php generated data");
 }
diff --git a/bbs/qadownload.php b/bbs/qadownload.php
index 3c1a838c0..b6f163ed7 100644
--- a/bbs/qadownload.php
+++ b/bbs/qadownload.php
@@ -22,21 +22,26 @@ if($is_guest) {
 
 $filepath = G5_DATA_PATH.'/qa/'.$file['qa_file'.$no];
 $filepath = addslashes($filepath);
-if (!is_file($filepath) || !file_exists($filepath))
+$file_exist_check = (!is_file($filepath) || !file_exists($filepath)) ? false : true;
+
+if ( false === run_replace('qa_download_file_exist_check', $file_exist_check, $file) ){
     alert('파일이 존재하지 않습니다.');
+}
 
 $g5['title'] = '다운로드 &gt; '.conv_subject($file['qa_subject'], 255);
 
+run_event('qa_download_file_header', $file, $file_exist_check);
+
 $original = urlencode($file['qa_source'.$no]);
 
 if(preg_match("/msie/i", $_SERVER['HTTP_USER_AGENT']) && preg_match("/5\.5/", $_SERVER['HTTP_USER_AGENT'])) {
     header("content-type: doesn/matter");
-    header("content-length: ".filesize("$filepath"));
+    header("content-length: ".filesize($filepath));
     header("content-disposition: attachment; filename=\"$original\"");
     header("content-transfer-encoding: binary");
 } else {
     header("content-type: file/unknown");
-    header("content-length: ".filesize("$filepath"));
+    header("content-length: ".filesize($filepath));
     header("content-disposition: attachment; filename=\"$original\"");
     header("content-description: php generated data");
 }
diff --git a/bbs/write_update.php b/bbs/write_update.php
index 3f50cc96a..723cb7857 100644
--- a/bbs/write_update.php
+++ b/bbs/write_update.php
@@ -466,9 +466,9 @@ for ($i=0; $i<count($_FILES['bf_file']['name']); $i++) {
     $upload[$i]['source']   = '';
     $upload[$i]['filesize'] = 0;
     $upload[$i]['image']    = array();
-    $upload[$i]['image'][0] = '';
-    $upload[$i]['image'][1] = '';
-    $upload[$i]['image'][2] = '';
+    $upload[$i]['image'][0] = 0;
+    $upload[$i]['image'][1] = 0;
+    $upload[$i]['image'][2] = 0;
     $upload[$i]['fileurl'] = '';
     $upload[$i]['thumburl'] = '';
     $upload[$i]['storage'] = '';
@@ -593,10 +593,10 @@ for ($i=0; $i<count($upload); $i++)
                              bf_fileurl = '{$upload[$i]['fileurl']}',
                              bf_thumburl = '{$upload[$i]['thumburl']}',
                              bf_storage = '{$upload[$i]['storage']}',
-                             bf_filesize = '{$upload[$i]['filesize']}',
-                             bf_width = '{$upload[$i]['image']['0']}',
-                             bf_height = '{$upload[$i]['image']['1']}',
-                             bf_type = '{$upload[$i]['image']['2']}',
+                             bf_filesize = '".(int)$upload[$i]['filesize']."',
+                             bf_width = '".(int)$upload[$i]['image'][0]."',
+                             bf_height = '".(int)$upload[$i]['image'][1]."',
+                             bf_type = '".(int)$upload[$i]['image'][2]."',
                              bf_datetime = '".G5_TIME_YMDHIS."'
                       where bo_table = '{$bo_table}'
                                 and wr_id = '{$wr_id}'
@@ -626,10 +626,10 @@ for ($i=0; $i<count($upload); $i++)
                          bf_thumburl = '{$upload[$i]['thumburl']}',
                          bf_storage = '{$upload[$i]['storage']}',
                          bf_download = 0,
-                         bf_filesize = '{$upload[$i]['filesize']}',
-                         bf_width = '{$upload[$i]['image']['0']}',
-                         bf_height = '{$upload[$i]['image']['1']}',
-                         bf_type = '{$upload[$i]['image']['2']}',
+                         bf_filesize = '".(int)$upload[$i]['filesize']."',
+                         bf_width = '".(int)$upload[$i]['image'][0]."',
+                         bf_height = '".(int)$upload[$i]['image'][1]."',
+                         bf_type = '".(int)$upload[$i]['image'][2]."',
                          bf_datetime = '".G5_TIME_YMDHIS."' ";
         sql_query($sql);