2.3 to 2.3.1 upgrade gives post2cat errors?

Hi there,

I did the 2.3.1 upgrade yesterday, disabled all plugins etc prior. Now I see the following error in the ‘Write Post’ page:

WordPress database error: [Table ‘mydbname.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

I can still publish the post fine (it appears) but the same error appear plus an extra line:

Warning: Cannot modify header information – headers already sent by (output started at /usr/www/users/myuser/mysite/wp-includes/wp-db.php:160) in /usr/www/users/myuser/mysite/wp-includes/pluggable.php on line 391

This is occurring for me on three installations… any ideas? The errors I’ve pasted in above come from an installation with up-to-date plugins etc – and never had these errors with 2.3.

Regards

David