Board Thread:Support Requests - Getting Technical/@comment-3387692-20130103043303/@comment-957747-20130103220640

It's possible that File:Placeholder is being converted since it's a magic word. You'd probably be better off simply removing that from the existing infoboxes and only worrying about the script to show the default image or the image that was uploaded.

A simple bot run can remove all instances of Image/File:Placeholder quickly and painlessly.