Problem with <pun include> and header.inc from Nucleus

// START SUBST - <pun_include "*">
while (preg_match('#<pun_include "([^/\\\\]*?)">#', $tpl_main, $cur_include))
{
    if (!file_exists(PUN_ROOT.'include/user/'.$cur_include[1]))
        error('Unable to process user include <pun_include "'.htmlspecialchars($cur_include[1]).'"> from template main.tpl. There is no such file in folder /include/user/');

    ob_start();
    include PUN_ROOT.'include/user/'.$cur_include[1];
    $tpl_temp = ob_get_contents();
    $tpl_main = str_replace($cur_include[0], $tpl_temp, $tpl_main);
    ob_end_clean();
}
// END SUBST - <pun_include "*">

// START SUBST - <pun_include "*">
while (preg_match('#<pun_include "([^/\\\\]*?)">#', $tpl_main, $cur_include))
{
    ob_start();
    include $cur_include[1];
    $tpl_temp = ob_get_contents();
    $tpl_main = str_replace($cur_include[0], $tpl_temp, $tpl_main);
    ob_end_clean();
}
// END SUBST - <pun_include "*">

// START SUBST - <pun_include "*">
while (preg_match('#<pun_include "(.*?)">#', $tpl_main, $cur_include))
{
    ob_start();
    include $cur_include[1];
    $tpl_temp = ob_get_contents();
    $tpl_main = str_replace($cur_include[0], $tpl_temp, $tpl_main);
    ob_end_clean();
}
// END SUBST - <pun_include "*">