How do I fix unexpected redirection of visitors after enabling multisite on WP3?

I am answering my own question so others can find it in the future.

defining NOBLOGREDIRECT in wp-config.php to point to the url of your choice will correct this problem.

Sample:

define('NOBLOGREDIRECT', 'http://www.my-domain.com');

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)