Problem when adding content with fivestar field

Hi. First of all - thank you for your module - it meets all my needs :) .

My problem (Drupal 5.1): after submitting a story with fivestar CCK field added - I get such warnings:

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warning: Invalid argument supplied for foreach() in /var/www/site/site.com/modules/node/node.module on line 504.

warning: implode() [function.implode]: Bad arguments. in /var/www/site/site.com/modules/node/node.module on line 508.
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 '' at line 1 query: SELECT n.nid, n.vid, n.type, n.status, n.created, n.changed, n.comment, n.promote, n.sticky, r.timestamp AS revision_timestamp, r.title, r.body, r.teaser, r.log, r.format, u.uid, u.name, u.picture, u.data FROM node n INNER JOIN users u ON u.uid = n.uid INNER JOIN node_revisions r ON r.vid = n.vid WHERE in /var/www/site/site.com/includes/database.mysql.inc on line 172.

warning: Invalid argument supplied for foreach() in /var/www/site/site.com/modules/node/node.module on line 504.

warning: implode() [function.implode]: Bad arguments. in /var/www/site/site.com/modules/node/node.module on line 508.
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 '' at line 1 query: SELECT n.nid, n.vid, n.type, n.status, n.created, n.changed, n.comment, n.promote, n.sticky, r.timestamp AS revision_timestamp, r.title, r.body, r.teaser, r.log, r.format, u.uid, u.name, u.picture, u.data FROM node n INNER JOIN users u ON u.uid = n.uid INNER JOIN node_revisions r ON r.vid = n.vid WHERE in /var/www/site/site.com/includes/database.mysql.inc on line 172.
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