Avoid using face properties reserved for the font-lock package.
(let ((end (point)))
(delete-region beg end)
(insert (propertize (mapconcat 'identity tags " ")
(let ((end (point)))
(delete-region beg end)
(insert (propertize (mapconcat 'identity tags " ")
- 'font-lock-face 'notmuch-tag-face))))))
+ 'face 'notmuch-tag-face))))))
(defun notmuch-search-get-tags ()
(save-excursion
(defun notmuch-search-get-tags ()
(save-excursion