[@johnhiler Member 15 years, 11 months ago]

_ck_ mentioned something about a higher-level htaccess file that sounded promising:

https://bbpress.org/forums/topic/add-new-goes-to-404-for-logged-out-users#post-31541

Htaccess files vary from server to server, which may explain why you’re seeing this but other users aren’t consistently hitting the same issue… could that be a potential source of the issue?