Catalogue Hierarchy Check Dashboard Module
for osCommerce Online Merchant v2.3
If a category in the shop catalogue contains both products and categories, the categores are not shown in standard osCommerce index.php
Worse, if the category only contains inactive products, you see a message 'there are no products available in this category'.
This admin dashboard module checks for mixed categories, and lists any with a link straight into categories.php so you can sort it out.
Support thread: http://forums.oscommerce.com/topic/410864-addon-catalogue-hierarchy-check-dashboard-module/