[@mmaunder Participant 13 years, 11 months ago]

I’ve also had to downgrade to 2.1.3 after getting reports from some users that they were seeing the page not found page on all pages under our /forums/

I’ve filed a trac ticket here:

https://bbpress.trac.wordpress.org/ticket/2041

Copy and pasting the text:

After upgrading to 2.2 I got reports from certain users that they were seeing our page not found on all forum pages under the /forums/ URL including the base URL itself.

I logged in and tested it with my admin account and did not see it.

I created a normal user account and also could not repro.

I then signed in as that specific user and got a repro.

I then checked the network activity in Chrome and noticed that the site was sending a 200 HTTP code but serving up the standard 404 page. Which explains why I wasn’t seeing any 404’s in my web server error log.

Note that our forums are accessed via HTTPS so this may help you repro.

I downgraded to 2.1.3 and instantly the issue was fixed.

I haven’t noticed any heuristic with the user account that I managed to repro on. I even checked the cookie string to see if there was something odd about that users cookies, but didn’t notice anything.