Hi,
I tried to switch my theme to SEO Position, and it worked fine for the admin, but for a regular user it generated this error message at the top of every page:

user warning: Unknown column 'n.uid' in 'where clause' query: SELECT DISTINCT(n.nid) FROM node_comment_statistics n INNER JOIN node_access na ON na.nid = n.nid LEFT OUTER JOIN private_nodes pn ON pn.nid = n.nid WHERE (na.grant_view >= 1 AND ((na.gid = 0 AND na.realm = 'all') OR (na.gid = 2 AND na.realm = 'forum_access'))) AND ((pn.nid is null OR n.uid=2)) AND ( n.comment_count > 0 ) ORDER BY n.last_comment_timestamp DESC LIMIT 0, 10 in /home/qualityw/public_html/thepoetryworkshop.com/includes/database.mysql.inc on line 172.

Do you know what this means and why it would do this? I don't understand why it only happens for a regular user? THe site owrked fine on the old theme for all users, and it worked fine in SEO for admin.