Index: /temp/trunk/html/admin/system/bkup.php
===================================================================
--- /temp/trunk/html/admin/system/bkup.php	(revision 5672)
+++ /temp/trunk/html/admin/system/bkup.php	(revision 5673)
@@ -216,5 +216,5 @@
 		foreach($array as $key => $val) {
 			if ($val == "") {
-				$line .= "".null.",";
+				$line .= "NULL,";
 			}else{
 				$line .= "'".$val."',";