manual cron reports error

I just installed merci (and required module) and ran cron from http://drupal-6.dev/admin/reports/status manually.

(The site has no content related to merci. Just 1 page.)

    user warning: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '<= '2011-04-21 10:50:43' AND > '2011-04-21 10:50:43' AND mr.merci_' at line 4 query: SELECT n.nid FROM node AS n INNER JOIN content_ ct ON ct.vid = n.vid INNER JOIN merci_reservation AS mr ON n.vid = mr.vid WHERE <= '2011-04-21 10:50:43' AND > '2011-04-21 10:50:43' AND mr.merci_reservation_status IN (1, 2) in /Users/clemens/Sites/drupal-6.dev/www/sites/all/modules/merci/merci.module on line 1056.
    user warning: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '<= '2011-04-21 10:50:43' AND mr.merci_reservation_status IN (3)' at line 4 query: SELECT n.nid FROM node AS n INNER JOIN content_ ct ON ct.vid = n.vid INNER JOIN merci_reservation AS mr ON n.vid = mr.vid WHERE <= '2011-04-21 10:50:43' AND mr.merci_reservation_status IN (3) in /Users/clemens/Sites/drupal-6.dev/www/sites/all/modules/merci/merci.module on line 1084.
    user warning: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '<= '2011-04-21 11:50:43' AND mr.merci_reservation_status IN (2)' at line 4 query: SELECT n.nid FROM node AS n INNER JOIN content_ ct ON ct.vid = n.vid INNER JOIN merci_reservation AS mr ON n.vid = mr.vid WHERE <= '2011-04-21 11:50:43' AND mr.merci_reservation_status IN (2) in /Users/clemens/Sites/drupal-6.dev/www/sites/all/modules/merci/merci.module on line 1117.