I've noticed that when a thread is moved it wreaks havoc with the last post feature on that thread. The last post seems to get permanently locked in the original location's placeholder. (I.E. if Ned was the last person to post before the thread was moved, in the thread's original location, Ned will always be shown as the last post.) I'm assuming this is because the forum isn't smart enough to look for the last post data in the new location.
Second, if you stupidly actually click on the last post icon in the moved thread's original location, instead of it taking you to the moved location like it does when you click on the thread link, it just brings up an error page for "The topic or post you requested does not exist". Which, again, is likely because the forum isn't smart enough to look for the last post in the new location.
So it looks like the last post code needs a lot of work for handling when threads are moved. That or maybe, like the page numbers, it should just not be available in the original location placeholders.
Second, if you stupidly actually click on the last post icon in the moved thread's original location, instead of it taking you to the moved location like it does when you click on the thread link, it just brings up an error page for "The topic or post you requested does not exist". Which, again, is likely because the forum isn't smart enough to look for the last post in the new location.
So it looks like the last post code needs a lot of work for handling when threads are moved. That or maybe, like the page numbers, it should just not be available in the original location placeholders.