(short preface to post: I am completely new to Drupal and databases, and although I am really trying to learn as much as I can, I just can't figure this one out myself...)
I have just installed the categories module on a fresh install of Drupal 4.7 (which went very smoothly!). This module is actually the reason I settled on Drupal as a CMS as I run a non blog site and it gives me exactly the functionality I need - or rather it would, if I could get it to work!
I followed the module's install instructions, including manually installing the taxonomy wrapper and I was getting some database errors when I clicked on the categories menu option in the admin panel. At this point I panicked and thought I might have installed the wrapper wrongly, so I re-installed the original taxonomy.module, and the categories module again. This time I didn't bother installing the taxonomy wrapper. But I am still getting the same messages. This is what I get when I tried to create a new container:
# user warning: Table 'database_name.category' doesn't exist query: SELECT c.cid, c.*, h.parent, n.title, cn.admin_title FROM category c INNER JOIN category_hierarchy h ON c.cid = h.cid INNER JOIN node n ON c.cid = n.nid LEFT JOIN category_cont cn ON c.cid = cn.cid LEFT JOIN category c2 ON h.parent = c2.cid WHERE (c2.cid IS NOT NULL OR h.parent = 0) AND n.status = 1 AND n.moderate = 0 ORDER BY c.weight, n.title in /home/seema/domains/mydomain.com/public_html/includes/database.mysql.inc on line 120.