Shopping.com has announced new feed specifications that will be enforced on 9/1/11.
Stock Availability will now be a required field. We will make this a required field in Feed Perfect beginning on 8/31/11.
The following fields will be not be supported after 9/1 and will be removed from Feed Perfect:
Subcategory Name, [...]

As you may know Google has changed the requirements to the Google Product Search Feed Specification and Policies. One of these significant changes is the addition of the Google Product Category field. This new attribute contains the category of the product according to Google’s product taxonomy.  Google Product Category will be required for all items [...]