The A-Z index page has now been modified so that it works in two ways: the default is that it shows only documents, or items from documents, whose status is 'final', 'published', 'stub' or 'generated' (in other words, documents that we want people to see on the site). However, there's also a requirement that encoders and contributors be able to see the complete list of ids, so if you add the parameter "show=all" you'll see everything. The old URL ids.htm has now been aliased so that it points at the "show=all" variant.