After upgrading from 2.1 to 2.31, I get the following error message on all my posts:
[Table 'onethum2_newold.wp_post2cat' doesn't exist]
SELECT t1.ID, t1.post_title, t1.post_date, t1.post_content, t3.display_name FROM wp_posts t1, wp_post2cat t2, wp_users t3 WHERE t1.ID=t2.post_id AND t1.post_status = 'publish' AND t1.ID != 1022 AND t2.category_id IN (6) AND t2.category_id NOT IN (-9999) AND t1.post_author = t3.ID ORDER BY rand() LIMIT 3
I know it is not a theme problem since I switched to the default theme.
Does anyone understand the error message above, and does anyone know what I can do to correct this?