disabled categories error

Drupal 4.6.6
site_map.module,v 1.9.2.5 2006/04/20 07:26:59

I had Categories enabled, then I decided my categories needed a little more work on them before I displayed them in Site Map. So I disabled the check boxes for Categories.

I received the following errors - if I enable categories - errors go away

warning: implode(): Bad arguments. in /home/.needle/user/mysite.com/modules/site_map/site_map.module on line 180.

user error: 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 ') ORDER BY weight ASC, name' at line 2
query: SELECT vid, name, description 
    FROM main_vocabulary WHERE vid IN () ORDER BY weight ASC, name in /home/.needle/user/mysite.com/includes/database.mysql.inc on line 66.

thanks
PS: thank you picking this module up - I really like the improvments