Merely that if a newbie (or indeed ...) posts in a given forum and bookmarks that forum - or that post - then if the post is moved, it will no longer appear in that forum.
Does a moderator (or "level three") put a token entry back in the forum? I would gather that there may be a function that a moderator could use to do that automatically, the same topic heading and author but containing only a link. As I recall, the old forum did that. But what happens if a "level three" moves it?
Just wondering on the detail.