Awarn - 11:53 pm on Jun 17, 2013 (gmt 0)
They have had those soft 404s for some time now. Commonly I see these on a product that we no longer carry. It hits the same product page but itemid parameter doesn't exist because that product has been removed. So the product page is valid and still gives results but since that specific item is deleted from the database no data is being retrieved.