I get database errors when composing a post

[murky]

I've just upgraded to 2.5, all looks okay, except for the following:

When writing a new post, a pink area keeps appearing and then going away again under the save/publish buttons. There is text in it which says the following:

WordPress database error: [Table 'murkiero_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/murkiero/public_html/murky.org/blg/wp-includes/wp-db.php:216) in /home/murkiero/public_html/murky.org/blg/wp-includes/classes.php on line 805

The site is murky.org/blg (a subdomain of murkier.org)

Update. This is resolved.

I did a grep and found the phrase in google sitemaps plugin. Though the plugin reporter told me I had just updated it, this was a fib. There is a more recent version.