The following message is a courtesy copy of an article that has been posted to comp.emacs.xemacs as well. I installed this, and I get: (n) (error/warning) Error in `post-command-hook' (setting hook to nil): (wrong-type-argument extent-live-p #<extent>) (where n just increments away) in a *Warnings-Show* buffer. after virtually every action. including guaranteed: 1. switching between insert and command mode in viper. 2. Making a new buffer with font-lock on (I think) This reminds me of something that happened to me when I used mailcrypt... It was related to font lock in some way. Any ideas? Soren Signaling: (wrong-type-argument extent-live-p #<destroyed extent>) viper-overlay-put(#<destroyed extent> face nil) viper-hide-replace-overlay() viper-change-state-to-vi() viper-mode() #<compiled-function (buf) "...(59)" [buf get-buffer buffer-name major-mode viper-vi-state-mode-list viper-current-state emacs-state viper-mode viper-emacs-state-mode-list viper-change-state-to-emacs viper-insert-state-mode-list insert-state viper-change-state-to-insert] 3>(#<buffer "*Article*">) mapcar(#<compiled-function (buf) "...(59)" [buf get-buffer buffer-name major-mode viper-vi-state-mode-list viper-current-state emacs-state viper-mode viper-emacs-state-mode-list viper-change-state-to-emacs viper-insert-state-mode-list insert-state viper-change-state-to-insert] 3> (#<buffer " *nntpd*"> #<buffer " *nntpd*"> #<buffer " *nntpd*"> #<buffer " *nntpd*"> #<buffer " *nntpd*"> #<buffer "*mail*<2>"> #<buffer " *nntpd*"> #<buffer "*Summary nndraft:drafts*"> #<buffer " *nntpd*"> #<buffer " *nntpd*"> #<buffer " *nntpd*"> #<buffer " *nntpd*"> #<buffer " *nntpd*"> #<buffer " *nntpd*"> #<buffer " *nntpd*"> #<buffer " *nntpd*"> #<buffer " *nntpd*"> #<buffer " *nntpd*"> #<buffer " *nntpd*"> #<buffer " *nntpd*"> #<buffer " *nntpd*"> #<buffer " *nntpd*"> #<buffer " *nntpd*"> #<buffer " *nntpd*"> #<buffer " *nntpd*"> #<buffer " *nntpd*"> #<buffer " *nntpd*"> #<buffer " *nntpd*"> #<buffer " *nntpd*"> #<buffer " *nntpd*"> #<buffer " *nntpd*"> #<buffer " *nntpd*"> #<buffer " *nntpd*"> #<buffer " *nntpd*"> #<buffer " *nntpd*"> #<buffer " *nntpd*"> #<buffer " *nntpd*"> #<buffer " *nntpd*"> #<buffer " *nntpd*"> #<buffer " *nntpd*"> #<buffer " *nntpd*"> #<buffer " *nntpd*"> #<buffer " *nntpd*"> #<buffer " *nntpd*"> #<buffer " *nntpd*"> #<buffer " *nntpd*"> #<buffer " *nntpd*"> #<buffer " *nntpd*"> #<buffer " *nntpd*"> #<buffer " *nntpd*"> ...)) set-viper-state-in-major-mode() run-hooks(set-viper-state-in-major-mode) viper-post-command-sentinel() aj(a)suse.de (Andreas Jaeger) writes: