this is copied from the html_header.php file and Zen has taken care of this(red emphasis mine):
Code:
/**
* load all site-wide jscript_*.js files from includes/templates/YOURTEMPLATE/jscript, alphabetically
*/
$directory_array = $template->get_template_part($template->get_template_dir('.js',DIR_WS_TEMPLATE, $current_page_base,'jscript'), '/^jscript_/', '.js');
while(list ($key, $value) = each($directory_array)) {
echo '<script type="text/javascript" src="' . $template->get_template_dir('.js',DIR_WS_TEMPLATE, $current_page_base,'jscript') . '/' . $value . '"></script>'."\n";
}