Upgraded my forum to 1.5 beta with latest nginx, php and I notice that the url title is not automatically fetched. I tried to use a few urls from here and it has the same issue so it's not unique to my site. I posted on XF forum and Chris.D answer that it may relate to DNS/firewall/etc XF 1.5 - Welcome to XenForo 1.5 / Assorted Improvements | Page 6 | XenForo Community @eva2000 do you use any addon to fetch the title? Have you updated to 1.5 yet?
I just upgraded my test Forum from 1.4.8 to 1.5 Beta 1, And Convert URLs to Page Titles is working fine for me. Did you enable it on /admin.php?options/list/seo ?