wp_post2cat doesn’t exist

I just upgraded from 2.2 to 2.3, and now I get the following error when I try to delete or post a comment:

WordPress database error: [Table ‘paintba3_wordpress.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

That’s the error that shows up when posting a comment, however, the comment does get posted.

I don’t know mysql too well, but if i’m not mistaken, it’s telling me that a table isn’t there or got deleted in the upgrade process.

Is there any quick way to fix this? I can’t think of anything i did wrong in the upgrade that would have caused it.

any help is appreciated. Thanks.