Apparently now the MediaWiki:Retrievedfrom is being escaped, and this breaks the automatic navigation feature on Portuguese Wikibooks:
https://pt.wikibooks.org/w/index.php?title=MediaWiki:Retrievedfrom&oldid=251794&action=edit
Instead of the previous/next links for the chapters of our books, the readers now see a HTML string such as
<div class="printonly">Retrieved from "https://pt.wikibooks.org/w/index.php?title=SomeBook/SomeChapter&oldid=123456"</div>
That is the workaround for T17073: Create a way for handling meta-organization of books (which is a small piece of T17071: Wikibooks/Wikisource needs means to associate separate pages with books).