Here is an updated version that uses the new extension registration system and MagicWordFactory. It seems to work fine for 1.35.3, and I think is really close to being able to work on 1.31, but I gave up on 1.31 for the moment. Because this is one of my favorite (underappreciated!) extensions, I would like to help get it back up in ExtensionDistributor and Translatewiki and whatnot, but let's take this one small step at a time.
Topic on Extension talk:PlaceNewSection
Fixed for 1.31.x now, if anyone has one of those old versions around. Use the REL1_31 branch from the Git repo.