From " to '

php/modules/Database.php

@@ -21,7 +21,7 @@ class Database extends Module {
 
 		# Avoid sql injection on older MySQL versions by using GBK
 		if ($database->server_version<50500) $database->set_charset('GBK');
-		else $database->set_charset("utf8");
+		else $database->set_charset('utf8');
 
 		# Set unicode
 		$database->query('SET NAMES utf8;');