It\'s quite easy to solve. It has got to do with PHP 5.3.17
open the file and change these lines 393-400 into:
==============
if ($action_par != \\\'\\\') {
$action_params = array();
$action_params = explode(\\\'&\\\',$action_par);
foreach ($action_params AS $this_par) {
list($key, $value) = explode(\\\'=\\\',$this_par);
$form .= tep_draw_hidden_field( $key, $value );
};
}
===============
The split functions changed into explode