Some I can clearly see such as this:
Old vBulletin URL: http://www.hairlosstalk.com/interact/forumdisplay.php/12
New XenForo URL: https://www.hairlosstalk.com/interact/forums/hair-transplants-hair-replacement-surgery.12/
(note we also went from http to https)
Here are the redirect rules I see he put into the htaccess file. I don't know if some are wrong, or something is missing:
# FORUM CATEGORIES
RewriteRule ^forumdisplay\.php/([0-9]+)-([^\.]+)/page([0-9]+)$ https://www.hairlosstalk.com/interact/forums/$2\.$1/page-$3 [L,R=301,NC]
RewriteRule ^forumdisplay.php/([0-9]+)-([^\.]+)$ https://www.hairlosstalk.com/interact/forums/$2\.$1 [L,R=301,NC]
Redirect 301 ^forumdisplay.php/8-Men-s-Hair-Loss-Discussions https://www.hairlosstalk.com/interact/#mens-hair-loss-discussions.8
Also seeing that threads are not redirecting properly either.
I've attached the entire htaccess file just in case also.