Issue: Board requires mod approval after vault wiki install

If the permissions are indeed correct as you say, in both: Usergroup Permissions, and Forum Permissions.
Then it is still possible the permissions-cache is not correct for some reason.

What version of vBulletin are you using, and are you using something like Memcached, Xcache, etc?
IIRC vBulletin < 4.1.6 or something like that was inexplicably erasing some caches sometimes. For me the problem seems to be gone nowadays since upgrading vBulletin.

You can try rebuilding the permissions cache manually:
1. AdminCP > Rebuild > Rebuild Bitfields
2. AdminCP > Update Counters > Rebuild Forum Information
Also, if you edit any permissions manually, this would also update the cache, and might shed light on any problems with permission storage.

Hope this helps.

Okay, rebuilding the bitfields took some googling to figure out, but i did both of them... we'll see what happens.

Thank you!