I noticed recently that my message buffer was getting clobbered with thousands of Invalid face reference errors when moving point around an org-agenda buffer. e.g.: > Invalid face reference: t [4519 times] Git bisect points to commit 7a12e149907b5921011710d869b7554c35859c89 > org.el (org-display-outline-path): Fix faces of the message > > * lisp/org.el (org-display-outline-path): Set :height as the > default face height, and don't change other face attributes. > > See a3576543f for a previous fix, and this discussion: > As a workaround, setting `org-agenda-show-outline-path' to nil prevents the errors. I believe the face spec in the call to `add-face-text-property' in `org-display-outline-path' is incorrect. The attached patch replaces it with an anonymous face, which works on my end.