I have a multisite install using BatCache and Memcached. PHP sessions are also being stored on Memcached.
After creating a new blog with an existing user, the user is shown a permissions error when trying to access /wp-admin. If I flush memcache, the problem resolves.
I'm assuming there is something being stored in the Object Cache that needs to be cleared. My plan is to hook into the add_user_to_blog action and flush the required keys, but I'm not sure which key(s) need to be flushed.
These keys look interesting:
Anyone know if those are the right keys to flush, or how else I might resolve the issue?
Thanks for any assistance!