That's funny because I remember having to change URL's in posts everytime I moved a thread from old forum to the new one. But hey, you and DBA can just ignore what I say... And not believe me. Ya know.
Sorry, I don't want this to turn snippy. Really, though, I've been running my forum on vBulletin since 2002, and I've never had to edit any URLs to any posts. I just moved a thread now to confirm the thread ID does not change (vB 3.8).
I can't find any specific info on 'URL Portion' - what exactly is this and what does it do? I mean I tried to enter a URL in that field but it doesn't accept? What is supposed to be put in their and in what format?