Is there any way to automatically close filename completetion buffers in Emacs?

Question

For example, when you open a file via C-x-C-f, you can TAB complete file names, and if there are more than one possible completions, it will pop open a completion buffer with a

Answer 1

Sorry to enter really late on this but this is how I do:

;; Remove completion buffer when done
(add-hook 'minibuffer-exit-hook 
      '(lambda ()
         (let ((buffer "*Completions*"))
           (and (get-buffer buffer)
            (kill-buffer buffer)))))

Tested on GNU Emacs 22.x and 23.x