[@apet083 Participant 13 years, 10 months ago]

Thanks for your reply Stephen. The site is live on Windows Server 2008 with IIS 7.5

All other links seem to work, it is just when people reply to topics that it jumps around…

After resetting permalinks on my dev environment and setting the slugs to the WordPress defaults these are the URLS.

Navigating to a topic from the list of recent topics:
http://localhost/sitename/forums/topic/test-topic/

Navigating to a forum from the list of forums:
http://localhost/sitename/forums/forum/forum-name/

Navigating to a topic after clicking on a forum from above:
http://localhost/sitename/forums/topic/test-topic/ (this is consistent with the first link which is good).

Posting a reply from inside test-topic
http://localhost/sitename/forums/forum/forum-name/#post-158293

Posting a reply from http://localhost/sitename/forums/topic/test-topic/#post-158277:
http://localhost/sitename/sitename/forums/topic/test-topic/#post-158294

Note that it doubled the sitename ^ but this doesn’t seem to affect it and lands back at the topic which is what I want.