Found and fixed in dev and stable. The linkcache entries weren't being
cleared from memcached, so subsequent visits would pick up the wrong
stored page id number and get very very confused, leading to the
appearence that the move failed or that both the old and new titles
apply to the page.
I've added LinkCache::clearLink() and called it from the move page
functions to keep things clean.
-- brion vibber (brion @
pobox.com)