Some issue with memcached... not sure what yet, and don't really have the time to look at it right now, so I just stopped using it (for now).
memcached - it can be turned off from the admin panel for vbulletin ? Is it a kinda server application?
You are late... missed the slow party matey.. (memcached problem solved by Shawn) .. and plz read the posts (atleast a few last ones) next time