In the tracker report when switching a given date field to advanced_mod, then you insert wrong input  (spaces, string,etc...) within start_date or end-date, the display of the report is broken and there is no way to see it again, since the non-valid criteria values are saved to the report:

[Mon Mar 17 17:14:19 2014] [error] [client 10.157.12.182] PHP Notice:  DB error ==>
  SELECT GROUP_CONCAT(DISTINCT id) AS id, GROUP_CONCAT(DISTINCT last_changeset_id) AS last_changeset_id  
  FROM (SELECT c.artifact_id AS id, c.id AS last_changeset_id  FROM tracker_artifact AS artifact\n 
  INNER JOIN tracker_changeset AS c ON (artifact.last_changeset_id = c.id)
  INNER JOIN tracker_changeset_value AS A_376 ON (A_376.changeset_id = c.id AND A_376.field_id IN (376))\n   
  INNER JOIN tracker_changeset_value_list AS C_376 ON (\n    C_376.changeset_value_id = A_376.id\n    AND C_376.bindvalue_id IN(334)\n  ) \n
  INNER JOIN tracker_changeset_value AS A_379 \n
        ON (A_379.changeset_id = c.id \n  
        AND A_379.field_id = 379\n                     ) \n
        INNER JOIN tracker_changeset_value_list AS B_379 ON (B_379.changeset_value_id = A_379.id) \n \n 
        INNER JOIN tracker_changeset_value AS A_372 ON (A_372.changeset_id = c.id AND A_372.field_id IN (3 
        in /usr/share/codendi/src/common/dao/include/DataAccessObject.class.php on line 152, referer: http://crx19007.cro.st.com/plugins/tracker/?tracker=10

[Mon Mar 17 17:14:19 2014] [error] [client 10.157.12.182] PHP Fatal error:  Call to a member function getRow() on a non-object in /usr/share/codendi/plugins/tracker/include/Tracker/Report/Tracker_Report.class.php on line 325, referer: http://crx19007.cro.st.com/plugins/tracker/?tracker=10