Re: [O] Bug: Priority #B in Agenda causes invalid face reference [8.2.1 (8.2.1-15-ge5cecc-elpa @ /Users/Paul/.emacs.d/elpa/org-20131021/)]

[Renato]

I'm using release_8.2.10 and experienced the same problem.

The problem seems to be the function org-agenda-fontify-priorities which
calls:
(org-face-from-face-or-color
                       'priority nil
                       (cdr (assoc p org-priority-faces)))

which expects a face to inherit from. When org-priority-faces is nil or
color or even does not specify the priority(e.g. "B") it inherits from
nil and causes the message.
Setting it to something like 
   (quote
    ((65 . org-level-1)
     (66 . org-level-2)
     (67 . org-level-3)
     (68 . org-level-4))))

is a workaround to the problem.

Renato