I just spend a good half hour tracking this down.  It looks like this, in org-mode is killing me.  It look wrong to me, but I'm not an expert:

    (set-display-table-slot
     org-display-table 4
     (vconcat (mapcar
      (lambda (c) (make-glyph-code c (and (not (stringp org-ellipsis))
  org-ellipsis)))
      (if (stringp org-ellipsis) org-ellipsis "..."))))

Why are we making a glyph-code out of an ellipsis?  We end up with a strange-looking display-table.

On 11/6/07, Andrew Hyatt <andrew_hyatt@yahoo.com> wrote:
I seem to have an issue where I will be using emacs for a while, and eventually something happens which will corrupt all org buffers, and make them unviewable (the buffer refuses to display, but otherwise does not affect the rest of my emacs session).  The error I get is "line-move-partial: Invalid face".  I can switch to text-mode and see it normally.

 
I'm using emacs version 23.0.0.1.  I'm using org-mode version  5.13a.  This seemed to coincide to my upgrade from org-mode version 4 to 5.13a.  This happens on both terminal and x-windows versions of emacs.

 
Has anyone experienced this issue before?  Any ideas on how to solve it?