Board Thread:Technical Updates/@comment-22224-20180312221333/@comment-27933806-20180314205849

When  changed its value, it broke an important part of a Wiki I'm an admin. That is, if we are in the page Article/Subpage1/Subpage2, we used to get Article/Subpage1 with that magic word and transclude a part of that page, but then the value changed to Article, which got transcluded instead messing up the site.

I solved it by using the  parser function -- see Template:BasePageName. There are 138 pages currently transcluding it, imagine how big the problem was.