DISTINCT throws error

When I add the "Distinct" option from 'No' to 'Yes' in the default settings of the calendar view, I get the following error:

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 'DISTINCT(node.nid), node.changed AS node_changed, node.title AS node_title' at line 1 query: SELECT DISTINCT(node.nid) AS DISTINCT(node.nid), node.changed AS node_changed, node.title AS node_title, node.type AS node_type FROM node node WHERE (node.status <> 0) AND ((DATE_FORMAT(ADDTIME(FROM_UNIXTIME(node.changed), SEC_TO_TIME(-28800)), '%Y-%m') <= '2009-02' AND DATE_FORMAT(ADDTIME(FROM_UNIXTIME(node.changed), SEC_TO_TIME(-28800)), '%Y-%m') >= '2009-02')) ORDER BY node_changed ASC in /home/cx4443/public_html/drupal-6.9/sites/all/modules/views/includes/view.inc on line 735.

The query below that appears as follows:

SELECT DISTINCT(node.nid) AS nid,
node.changed AS node_changed,
node.title AS node_title,
node.type AS node_type
FROM node node
WHERE (node.status <> 0)
AND ((DATE_FORMAT(ADDTIME(FROM_UNIXTIME(node.changed), SEC_TO_TIME(-28800)), '%Y-%m') <= '2009-02' AND DATE_FORMAT(ADDTIME(FROM_UNIXTIME(node.changed), SEC_TO_TIME(-28800)), '%Y-%m') >= '2009-02'))
ORDER BY node_changed ASC

Then when I save the view, I get this error:

* 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 'DISTINCT(node.nid), node_data_field_date.field_date_value AS node_data_field_' at line 1 query: SELECT COUNT(*) FROM (SELECT DISTINCT(node.nid) AS DISTINCT(node.nid), node_data_field_date.field_date_value AS node_data_field_date_field_date_value, node_data_field_date.field_date_value2 AS node_data_field_date_field_date_value2, node_data_field_date.field_date_rrule AS node_data_field_date_field_date_rrule, node_data_field_date.delta AS node_data_field_date_delta, node.title AS node_title, node.vid AS node_vid, node.type AS node_type, node.changed AS node_changed FROM node node LEFT JOIN content_field_date node_data_field_date ON node.vid = node_data_field_date.vid WHERE ((node.status <> 0) AND (node.type in ('event'))) AND (DATE_FORMAT(ADDTIME(node_data_field_date.field_date_value, SEC_TO_TIME(-28800)), '%Y-%m-%d') >= '2009-02-13') ORDER BY node_changed ASC ) count_alias in /home/cx4443/public_html/drupal-6.9/sites/all/modules/views/includes/view.inc on line 705.
* 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 'DISTINCT(node.nid), node_data_field_date.field_date_value AS node_data_field_' at line 1 query: SELECT DISTINCT(node.nid) AS DISTINCT(node.nid), node_data_field_date.field_date_value AS node_data_field_date_field_date_value, node_data_field_date.field_date_value2 AS node_data_field_date_field_date_value2, node_data_field_date.field_date_rrule AS node_data_field_date_field_date_rrule, node_data_field_date.delta AS node_data_field_date_delta, node.title AS node_title, node.vid AS node_vid, node.type AS node_type, node.changed AS node_changed FROM node node LEFT JOIN content_field_date node_data_field_date ON node.vid = node_data_field_date.vid WHERE ((node.status <> 0) AND (node.type in ('event'))) AND (DATE_FORMAT(ADDTIME(node_data_field_date.field_date_value, SEC_TO_TIME(-28800)), '%Y-%m-%d') >= '2009-02-13') ORDER BY node_changed ASC LIMIT 0, 5 in /home/cx4443/public_html/drupal-6.9/sites/all/modules/views/includes/view.inc on line 731.

No data appears in the block that previously showed the same event 5 or 6 times. The export of the view is quite long but I can paste that if it would be helpful. I'm running 6.x-2.0-rc6 Calendar module.