I still have keywords tagged as Inactive. But now even my active keyword are not generating ANY impressions since September 1. Is there something I need to do since this new Quality Score thing went into effect? What could cause a complete shut out?
It is hard to speak to the zero impressions on active keywords, based on this very minimal information, Widestrides - but please note that the Ads Quality changes being discussed in this thread have not yet launched - except to a very small number of advertisers, as was mentioned in the blog post linked-to in the first post.
If you still have keywords tagged as 'Inactive for search', then you are not one of the advertisers in the very limited initial launch.