[NTLDR]

OK

Find:

PHP Code:

// pre-cache templates used by specific actions
// link the page we're requesting to the do var so that vB3 will
// pre-cache the template and save 1 query 


Add after:

PHP Code:

// old php versions
if (PHP_VERSION < '4.1.0') {
    $_REQUEST['page'] = &$HTTP_GET_VARS['page'];
    $_REQUEST['section'] = &$HTTP_GET_VARS['section'];
} 


That should fix the problems on PHP versions older than 4.1.0