Renaming Clones
When I rename an existing article, it creates the edit as a new article with the title - rather than changing the title of the existing article. The result is duplicate content.
This is a result of some bug fixes for new article previews that messed up some aspects of the editor. And for some reason the server reports POST data even when the method used was GET. I have had to make some significant changes again to the way articles are fetched.