many warnings on changing locale for user account

Drupal 4.7.0 beta5 was installed with a new database. After having added the dutch locale from cvs, a change of the admin's account to use the nl locale, a series of warnings is shown:

user warning: Field 'translation' doesn't have a default value query: INSERT INTO locales_target (lid, locale) VALUES (1911, 'nl') in D:\share\drupal-4.7.0-beta5\includes\database.mysql.inc on line 120.
user warning: Field 'translation' doesn't have a default value query: INSERT INTO locales_target (lid, locale) VALUES (1912, 'nl') in D:\share\drupal-4.7.0-beta5\includes\database.mysql.inc on line 120.
etc. etc.

These warnings are shown for most pages!!

By the way, i'm using php 5 and mysql 5.