I am using 1.5.3 and that does seem to be the issue. When installing the configuration keys, I get:

[21-Jul-2014 09:54:23 America/Chicago] PHP Warning: mysql_insert_id(): Access denied for user 'nobody'@'localhost' (using password: NO) in /home/miashop/public_html/zencart/ADMIN_NAME/includes/functions/extra_functions/quick_updates_functions.php on line 16