1. xemacs -vanilla
2. (make-frame)
3. (custom-set-variables '(lazy-lock-mode t nil (lazy-lock)))
4. (find-file "~") ;; any file will do
5. Start switching between frame 1 and frame 2, and notice that
the cursor shows up in the minibuffer rather than the appropiate
window (ie, buffer)
Lazy lock also seems to occasionally have serious speed issues when
multiple frames are open.