When I go to "My Account" and under my profile click "Track" I get this error:

user warning: Unknown column 'n.nid' in 'on clause' query: SELECT COUNT(n.nid) FROM node n, term_node t LEFT JOIN comments c ON n.nid = c.nid WHERE n.nid = t.nid AND n.status = 1 AND (n.uid = '282' OR c.uid = '282') in /www/live/docs/afterellen.com/includes/database.mysql.inc on line 128.

It does that for all the users when I click on their "track" feature.