Found bug in categories.php
There was a problem when you try do duplicate a product.
Line 312, change this:
tep_db_query("insert into " . TABLE_PRODUCTS . " (products_quantity, products_model,products_image, products_price, products_date_added, products_date_available, products_weight, products_status, products_featured, products_tax_class_id, manufacturers_id) values ('" . tep_db_input($product['products_quantity']) . "', '" . tep_db_input($product['products_model']) . "', '" . tep_db_input($product['products_image']) . "', '" . tep_db_input($product['products_price']) . "', now(), '" . tep_db_input($product['products_date_available']) . "', '" . tep_db_input($product['products_weight']) . "', '0', '" . (int)$product['products_tax_class_id'] . "', '" . (int)$product['manufacturers_id'] . "')");
With this:
tep_db_query("insert into " . TABLE_PRODUCTS . " (products_quantity, products_model,products_image, products_price, products_date_added, products_date_available, products_weight, products_status, products_featured, products_tax_class_id, manufacturers_id) values ('" . tep_db_input($product['products_quantity']) . "', '" . tep_db_input($product['products_model']) . "', '" . tep_db_input($product['products_image']) . "', '" . tep_db_input($product['products_price']) . "', now(), '" . tep_db_input($product['products_date_available']) . "', '" . tep_db_input($product['products_weight']) . "', '0', '" . (int)$product['products_featured'] . "', '" . (int)$product['products_tax_class_id'] . "', '" . (int)$product['manufacturers_id'] . "')");
Cheers
Emiliano