mysql error for inserting users 'admin' and 'user'

Using php 5.2.1 and mysql 5.0, the installation profile returns 2 errors:

* user warning: Data truncated for column 'created' at row 1 query: INSERT INTO users (`uid`, `name`, `pass`, `mail`, `mode`, `sort`, `threshold`, `theme`, `signature`, `created`, `access`, `login`, `status`, `timezone`, `language`, `picture`, `init`, `data`) VALUES (1, 'admin', MD5('admin'), '', 0, 0, 0, '', '', NOW(), NOW(), 0, 1, NULL, '', '', '', NULL) in D:\WWW\htdocs\drupal-5.1\includes\database.mysql.inc on line 172.
* user warning: Data truncated for column 'created' at row 1 query: INSERT INTO users (`uid`, `name`, `pass`, `mail`, `mode`, `sort`, `threshold`, `theme`, `signature`, `created`, `access`, `login`, `status`, `timezone`, `language`, `picture`, `init`, `data`) VALUES (2, 'user', MD5('user'), '', 0, 0, 0, '', '', NOW(), NOW(), 0, 1, NULL, '', '', '', NULL) in D:\WWW\htdocs\drupal-5.1\includes\database.mysql.inc on line 172.

Maybe the now() functions should be replaced by unix_timestamp()?