Errors when posting new article

Hi there,

Been trying 2.3 RC and have upgraded the DB but when I post a new article or edit one I get the following errors:

WordPress database error: [Table ‘editor_blog.wp_post2cat’ doesn’t exist]
SELECT cat_ID AS ID, MAX(post_modified) AS last_mod FROM wp_posts p LEFT JOIN wp_post2cat pc ON p.ID = pc.post_id LEFT JOIN wp_categories c ON pc.category_id = c.cat_ID WHERE post_status = ‘publish’ GROUP BY cat_ID

WordPress database error: [Table ‘editor_blog.wp_post2cat’ doesn’t exist]
SELECT cat_ID AS ID, MAX(post_modified) AS last_mod FROM wp_posts p LEFT JOIN wp_post2cat pc ON p.ID = pc.post_id LEFT JOIN wp_categories c ON pc.category_id = c.cat_ID WHERE post_status = ‘publish’ GROUP BY cat_ID

Warning: Cannot modify header information – headers already sent by (output started at /home/editor/public_html/news/wp-includes/wp-db.php:160) in /home/editor/public_html/news/wp-includes/pluggable.php on line 383

Any idea what is happening here?

Thanks