This was in my log
Session "default" started at 2012-02-05T09:48:02+0000
#1 FATAL: exception 'DBQueryError' with message 'Query failed with message 'Unknown column 'mc.id' in 'IN/ALL/ANY subquery''' in /home/public_html/office/environment/library/database/adapters/AbstractDBAdapter.class.php:386
Stack trace:
#0 /home/public_html/office/environment/library/database/adapters/AbstractDBAdapter.class.php(272): AbstractDBAdapter->prepareAndExecute('??? ?SELECT ...', NULL)
#1 /home/public_html/office/environment/library/database/DB.class.php(145): AbstractDBAdapter->execute('??? ?SELECT ...', NULL)
#2 /home/public_html/office/plugins/mail/application/models/mail_contents/MailContents.class.php(348): DB::execute('??? ?SELECT ...')
#3 /home/public_html/office/plugins/mail/application/models/mail_contents/MailContents.class.php(279): MailContents::findByContext(Array)
#4 /home/public_html/office/plugins/mail/application/controllers/MailController.class.php(2426): MailContents->getEmails('', 'received', 'unread', 'all', Array, '0', 50, '`received_date`', 'DESC')
#5 /home/public_html/office/plugins/mail/application/controllers/MailController.class.php(2390): MailController->getEmails(Array, Array, '0', 50, '`received_date`', 'DESC')
#6 /home/public_html/office/environment/classes/controller/Controller.class.php(76): MailController->list_all()
#7 /home/public_html/office/environment/classes/controller/PageController.class.php(62): Controller->execute('list_all')
#8 /home/public_html/office/environment/classes/Env.class.php(133): PageController->execute('list_all')
#9 /home/public_html/office/init.php(164): Env::executeAction('mail', 'list_all')
#10 /home/public_html/office/index.php(9): require('/home/pu...')
#11 {main}
Time since start: 0.12056303024292 seconds
Searched all the files and db and there is no instance of mc.id .