Error post comment after getting site online

Hi all, I’ve got WP up and running locale here (PHP/MySQL @ Apple Powerbook), and “transferred” it to my online webspace. Now, everything is OK, but if I post a comment on a page, I get this error:


WordPress database error: [Duplicate entry '0' for key 1]
INSERT INTO wp_comments (comment_post_ID, comment_author, comment_author_email, comment_author_url, comment_author_IP, comment_date, comment_date_gmt, comment_content, comment_approved, comment_agent, comment_type, comment_parent, user_id) VALUES ('10', 'Willem', '[email protected]', 'https://www.willem169.nl', '212.49.84.107', '2006-03-22 11:31:09', '2006-03-22 08:31:09', 'En?', '1', 'Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.8.0.1) Gecko/20060111 Firefox/1.5.0.1', '', '0', '1')

Warning: Cannot modify header information - headers already sent by (output started at /home/httpd/vhosts/willem169.nl/httpdocs/wp-includes/wp-db.php:102) in /home/httpd/vhosts/willem169.nl/httpdocs/wp-includes/pluggable-functions.php on line 247

and line 247 of pluggable-functions.php says:


header("Location: $location");


Anyone got an idea?