User blog comment:Brandon Rhea/New Page and Article Headers: Official Release Date/@comment-3387274-20170613142317/@comment-20644-20170613143714

Hi 13th madman, I'm not sure what you mean by how this changed "without warning." We first announced this header update and the tests around it in March, which you can see here. The blog you replied to here was released 3 weeks ago once we knew the date that the header would be released. There was several months of warning, in which time we worked with test communities, the Community Council, and users here on Community Central on testing and feedback.

If I'm misunderstanding you, can you clarify?