We're having the same exact issue. Some feeds are randomly changing to shopping.com, and you get the 0 out of xxx items inserted message back.
We have found no way to fix it either, except by manually changing each feed that fails, which is not a real solution for us either as we have 100s of feeds that have started to fail. -- You received this message because you are subscribed to the Google Groups "Google Base Data API" group. To post to this group, send email to google-base-data-...@googlegroups.com. To unsubscribe from this group, send email to google-base-data-api+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-base-data-api?hl=en.