Adrian Aichner <aichner(a)ecf.teradyne.com&gt; writes in xemacs-beta(a)xemacs.org: APA> Right on: APA> With an unpatched vc.elc? fontification survives APA> vc-revert-buffer APA> when I have this in my .emacs: APA> (setq font-lock-support-mode 'fast-lock-mode) Then there must be something else involved. APA> Fontification is lost when I use any of these: APA> (setq font-lock-support-mode 'font-lock-mode) APA> (setq font-lock-support-mode 'lazy-lock-mode) Oh. The infamous lazy-good-for-nothing-lock-mode. That's a pissing contest between Ben Wing and Simon Marshall. I very nearly gave up XEmacs until I learned how to turn it off. For what it's worth, font-lock-mode works for me. Enabling lazy-lock-mode and doing a revert-buffer gives me a bomb: Signaling: (args-out-of-range #<buffer ".emacs"> 1 105913) lazy-lock-put-text-property(1 105913 fontified nil) lazy-lock-after-change-function(1 105913 52956) insert-file-contents-internal("/usr/users/steve/.emacs" t nil nil t undecided used-codesys) byte-code("..." [run-hook-with-args insert-file-contents-access-hook filename visit coding-system-for-read run-hook-with-args-until-success insert-file-contents-pre-hook find-file-coding-system-for-read-from-filename buffer-file-coding-system-for-read raw-text coding-system return-val find-coding-system message "Invalid coding-system (%s), using 'undecided" undecided insert-file-contents-internal beg end replace used-codesys find-coding-system-magic-cookie cs] 9) insert-file-contents("/usr/users/steve/.emacs" t nil nil t) #<compiled-function (&optional ignore-auto noconfirm preserve-modes) "...(261)" [revert-buffer-function ignore-auto noconfirm opoint recent-auto-save-p buffer-auto-save-file-name file-readable-p y-or-n-p "Buffer has been auto-saved recently. Revert from auto-save file? " auto-save-p buffer-file-name file-name error "Buffer does not seem to be associated with any file" buffer-modified-p nil found revert-without-query rx --dolist-temp--42045 string-match t yes-or-no-p format "Revert buffer from file %s? " run-hooks before-revert-hook verify-visited-file-modtime buffer-backed-up buffer-undo-list default-value after-revert-hook local-variable-p local-hook local-hook-p global-hook buffer-read-only revert-buffer-insert-file-contents-function file-exists-p "File %s no longer exists!" unlock-buffer insert-file-contents after-find-file preserve-modes set-default revert-buffer-internal-hook make-local-variable kill-local-variable] 7 853936 (list (not current-prefix-arg))>(t) call-interactively(revert-buffer) command-execute(revert-buffer t) execute-extended-command(nil) call-interactively(execute-extended-command) I tested both of those in an XEmacs/Mule by: xemacs -vanilla (font-lock-mode) C-x C-f ~/.emacs M-x revert-buffer and xemacs -vanilla (add-hook 'font-lock-mode-hook 'turn-on-lazy-lock) (font-lock-mode) C-x C-f ~/.emacs M-x revert-buffer I have no idea what `font-lock-support-mode' is. It is unbound in this instance of XEmacs. APA> For font-lock-mode fontification is lost after `revert-buffer' calls APA> `insert-file-contents'. This is probably due to coding system detection. Right.