If a forum (or sub-forum) has the same slug as a blog post (the slug being the part used in the url) then the blog post will be loaded when the request is made. This is how WordPress works I am afraid. SO it is necessary for the slug to be unique. This can be done by editing it and making some sort of adjustment in the edit forums admin panel.

Is this the problem you have?

No, the slug did contain the start of the blog post permalink but it not the complete permalink. And it seams like its function properly and then not.

so it works for while, then stops?  any other plugins that deal with permalinks that could be resetting it?  any redirection plugins?

I did first experience it after upgrading WordPress SEO, but this was also one of the few times I have written a article about a forum post. And I did find it on one more forum post.

I did install Plugin Organizer, and disabled a non-essential plugin on the forum page. And it still kept happening on and off. Maybe it is some caching in Simple Press? I do not use a caching plugin.

I did first experience it after upgrading WordPress SEO, but this was also one of the few times I have written a article about a forum post. And I did find it on one more forum post.

I did install Plugin Organizer, and disabled a non-essential plugin on the forum page. And it still kept happening a bitt on and off. Maybe it is some caching in Simple Press, I do not use a caching plugin. 

It is function ok right now.

If it happens again would be interested to have a link to the forum topic in question perhaps…

Hello,

I have same behabiour with my forum, after upgrading WordPress SEO and change permalinks wordpress structure.

I have 404 error for all forums. I can restore the problem with the Simple Press Permalinks page. And sometimes the problem comes back.

My URL forum : http://www.mana-earth.com/forum-mana-earth/

The problem isn’t active at this time.

Thank you

I have an other problem : i chanded the ID of admin count (again with WordPress SEO). 

I can’t use anymore the admin bar (of admin bar plugin). The bar isn’t displayed when i’m logged with this count.

do you turn off the yoast option for converting ugly permalinks? (forum doesnt have them anyways)…

did you turn on the option for this account?  each admin/mod account has their own options.. forum – admins – your admin options…

Yes, i turn off the yoast option for converting ugly permalinks. This option is not checked.

I have displayed the admin bar in “your admin options”. Thanks.

so are you sure your account is still an admin?  changing the user id shouldnt matter – provided how ever you did it move the rest of your wp user data too…

are you listed as admin in the stats? can you see the rest of the admin panels?

might try uninstalling the admin bar plugin and reactivating…

I meant i succed to displayed the admin bar.

But i have always the other problem.

so to be clear, can you elaborate on the remaining issue?  is it the redirection?

I succeed to display the admin bar, with the admin option.
I still have the permalinks broken problem.
The redirection isn’t the problem i think. I don’t understand why, sometimes, the links are broken… To fix it, i need to use the permalinks
and page section.

Sorry, my english is limited.
I don’t know how explain you better the problem… i don’t understand what’s going on.

which permalink are you using?

this seems to imply that another plugin is also altering the permalink rewrite rules perhaps… and not flushing them properly when adding theirs so other plugins can add theirs…  do you know of any that might do that?

what about redirection plugins – running any?