It is either 3.8.0 or 3.8.1, or if it's something in between then please specify the subversion revision number.
Regarding the error message about the undefined function var_export(): var_export is available since PHP 4.2.0 ( http://www.php.net/manual/en/function.var-export.php ), so if you're running PHP 4.4.2 it should be there. Maybe your web hosting provider has disabled it with the disable_functions directive in php.ini ( see http://www.php.net/manual/en/features.safe-mode.php )?