[EventCalendar] WordPress database error

[Dave Sabol]

I just upgraded one of my sites that was successfully running 3.0.4
without a hitch...

Everything on the admin side seems to be working great but when I try
to go to my sites home page, I receive this error:

WordPress database error: [Unknown column 'wp_post2cat.category_id' in
'on clause']
SELECT DISTINCT * FROM wp_posts LEFT JOIN wp_post2cat ec3_post2cat ON
ec3_post2cat.post_id=id LEFT JOIN wp_catt_visibility ON
(wp_post2cat.category_id = wp_catt_visibility.catt_ID) WHERE 1=1 AND
post_date_gmt <= '2006-10-11 14:10:59' AND (post_status = "publish" OR
post_author = 1 AND post_status != 'draft' AND post_status !=
'static') AND post_status != "attachment" AND
((wp_catt_visibility.front=1 AND wp_catt_visibility.cv_user_level<=10)
OR post_status='static' OR wp_catt_visibility.catt_ID IS NULL) AND
ec3_post2cat.category_id!=2 GROUP BY wp_posts.ID ORDER BY post_date
DESC LIMIT 0, 10

I am running 3.1._pre15. If you would like to see it for yourself you
can do so here: http://www.sprcc.net/

Thanks for your help as always.

P.S. On Darrell Schulte's great Widget, I think it would help to add a
conditional statement if it exists...probably just good practice to
have for plug-ins.

Dave