OK - sorry, it took an extra day. Here is the new (third, and hopefully last) test case. 1 Steps to Reproduce: 1.1 Start Emacs clean /Applications/Emacs.app/Contents/MacOS/Emacs -Q 1.1.1 Note: Emacs Version M-x emacs-version GNU Emacs 24.0.95.1 (x86_64-apple-darwin, NS apple-appkit-1038.36) of 2012-04-03 on bob.porkrind.org 1.2 Clone Git HEAD Org-Mode (to get the new commit) $ git clone git://orgmode.org/org-mode.git 1.3 Load Cloned version of org-mode Evaluate the following Lisp in *scratch* (require 'ido) (ido-mode t) (setq load-path (cons "~/tmp/new-new-new/org-mode/lisp" load-path)) (setq load-path (cons "~/tmp/new-new-new/org-mode/contrib/lisp" load-path)) (require 'org-install) (setq org-completion-use-ido t) (setq org-tag-alist (quote ( (:startgroup) ("tag_a" . ?a) ("tag_b" . ?b) (:endgroup) ("tag_c" . ?c) ))) 1.4 Open the following org-mode file * Header 1 ** Header 1.1 * Header 2 :Personal: 1.4.1 Note: Org-Version M-x org-version release_7.8.07-201-g72d9 Org-mode version 7.8.08 (release_7.8.07.201.g72d9) 1.5 Point should be on the first asterisk for “Header 1” 1.6 Type C-c C-q to bring up Tag selection The expected result is the fast tag selection window-split; this works 1.7 Type to enter free tag selection The expected result is that the Minibuffer prompts with Tag: and the ido completion (this works) 1.8 Type t to begin to ido select one of the tags The expected result is the ido completion narrowing the choices; the result Error in post-command-hook (ido-exhibit): (wrong-type-argument sequencep 97) Note that M-x toggle-debug-on-error doesn’t show anything different than the above. On Apr 2, 2012, at 11:50 AM, Bastien wrote: > Hi Mike, > > Mike McLean writes: > >> The dangers of minimal testing setups is rearing its ugly head. > > You bet :) > >> I can >> confirm that your latest patch does fix the minimal example that I >> provided. It does not, sadly, fix a similar case where the >> org-tag-alist variable includes the :startgroup and :endgroup tokens. >> If you can my most recent steps to reproduce, step 1.3, and add those >> tokens, the error is "Wrong type argument: stringp, :endgroup" > > Can you resubmit the full test case? > >> Thank you for you patience :) > > Thanks for your collaboration :) > > -- > Bastien >