While modifying posts, comments, pages etc.. the latest WordPress version 2.3 shows database error. The error is

WordPress database error: [Table '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

Though being an error the edition was successful. This in being raised as a ticket in wordpress and has been closed.

The error had nothing to do with wordpress, rather it was coming due to a plugin. If you are using google sitemap plugin then upgrade the plugin with the latest one.

Download google sitemap plugin .