When using org-refile, I'm accustom to getting ido completion when selecting a target due to the customizations in my init below. In org-mode release 9.0.5, the minibuffer won't ido for an org-refile. Ido works otherwise. There isn't an error, and refiling still works; ido completion is just missing. I changed to org-mode release 8.3.6, things work as expected.
; Use full outline paths for refile targets - we file directly with IDO
(setq org-refile-use-outline-path t)
; Targets complete directly with IDO
(setq org-outline-path-complete-in-steps nil)
; Allow refile to create parent tasks with confirmation
(setq org-refile-allow-creating-parent-nodes (quote confirm))
; Use IDO for both buffer and file completion and ido-everywhere to t
(setq org-completion-use-ido t)
(setq ido-everywhere t)
(setq ido-max-directory-size 100000)
(ido-mode (quote both))
; Use the current window when visiting files and buffers with ido
(setq ido-default-file-method 'selected-window)
(setq ido-default-buffer-method 'selected-window)
; Use the current window for indirect buffer display
(setq org-indirect-buffer-display 'current-window)
;;;; Refile settings
; Exclude DONE state tasks from refile targets
(defun bh/verify-refile-target ()
"Exclude todo keywords with a done state from refile targets"
(not (member (nth 2 (org-heading-components)) org-done-keywords)))
(setq org-refile-target-verify-function 'bh/verify-refile-target)