(moved from main page)

Dave: I was a little surprised that it is seemingly possible to create subpages for main pages that do not exist. Is it possible to create a warning when this is about to happen? Also the "subpage" header in the upper right corner of the page shows the non-existent main page as a real link rather than as a non-existent ("page name?") link. Should this be corrected?

unkx80: I have a similar comment for the Discuss Page link on the top as well.