error upon creating 1st parent node

I started fresh, downloaded the dev version and setup a parent and 1 child. When I went to create the initial parent node it worked, but I got some warnning errors:

    * warning: Invalid argument supplied for foreach() in C:\Inetpub\wwwroot\drupal\modules\node\node.module on line 504.
    * warning: implode() [function.implode]: Bad arguments. in C:\Inetpub\wwwroot\drupal\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 C:\Inetpub\wwwroot\drupal\includes\database.mysql.inc on line 172.

If I try an update on the parent node, all works fine.