When an org buffer coding system is "utf-8-with-signature-unix" (the first 3 bytes in file are 0xEF 0xBB 0xBF), export to ODT gives following LibreOffice error when opening the exported file : "The file 'test.odt' is corrupt and therefore cannot be opened. LibreOffice can try to repair the file. [etc...]".
If we set the encoding to "utf-8-unix" (no BOM), export is correct, and LibreOffice does not complain. To reproduce: Create a minimal org buffer, change the coding system (set-buffer-file-coding-system) to "utf-8-with-signature-unix", then export to ODT (C-c C-e o o), and open the generated odt file with LibreOffice. Note: Export to different formats (html, PDF, LaTeX) look correct. Versions: System: Xubuntu 20.04.1 LTS (focal) Emacs: 27.1 Org: 9.4 LibreOffice: 6.4 Regards, br. Attachement: test.org, a faulty org file (with Byte Order Mark). $ file test.org test.org: UTF-8 Unicode (with BOM) text ------------------------------------------------------------------------ Emacs : GNU Emacs 27.1 (build 1, x86_64-pc-linux-gnu, GTK+ Version 2.24.32) of 2020-10-29 Package: Org mode version 9.4 (9.4-29-g20374f-elpaplus @ /home/br/.emacs.d/elpa/org-plus-contrib-20201102/) current state: ============== (setq org-src-mode-hook '(org-src-babel-configure-edit-buffer org-src-mode-configure-edit-buffer) org-link-shell-confirm-function 'yes-or-no-p org-babel-after-execute-hook '(org-redisplay-inline-images) org-metadown-hook '(org-babel-pop-to-session-maybe) org-clock-out-hook '(org-clock-remove-empty-clock-drawer) org-html-format-inlinetask-function 'org-html-format-inlinetask-default-function org-odt-format-headline-function 'org-odt-format-headline-default-function org-ascii-format-inlinetask-function 'org-ascii-format-inlinetask-default org-startup-folded 'content org-mode-hook '(my/org-mode-hook org-tempo-setup #[0 "\300\301\302\303\304$\207" [add-hook change-major-mode-hook org-show-all append local] 5] #[0 "\300\301\302\303\304$\207" [add-hook change-major-mode-hook org-babel-show-result-all append local] 5] org-babel-result-hide-spec org-babel-hide-all-hashes #[0 "\301\211.\207" [imenu-create-index-function org-imenu-get-tree] 2] org-eldoc-load) org-odt-format-drawer-function #[514 "\207" [] 3 "\n\n(fn NAME CONTENTS)"] org-archive-hook '(org-attach-archive-delete-maybe) org-confirm-elisp-link-function 'yes-or-no-p org-agenda-before-write-hook '(org-agenda-add-entry-text) org-metaup-hook '(org-babel-load-in-session-maybe) org-bibtex-headline-format-function #[257 "\300.\236A\207" [:title] 3 "\n\n(fn ENTRY)"] org-latex-format-drawer-function #[514 "\207" [] 3 "\n\n(fn _ CONTENTS)"] org-babel-pre-tangle-hook '(save-buffer) org-tab-first-hook '(org-babel-hide-result-toggle-maybe org-babel-header-arg-expand) org-babel-load-languages '((calc . t) (emacs-lisp . t) (sql . t) (perl . t) (shell . t)) org-html-text-markup-alist '((verbatim . "<code class='verbatim'>%s</code>") (verbatim . "<code class='verbatim'>%s</code>") (verbatim . "<code class='verbatim'>%s</code>") (verbatim . "<code class='verbatim'>%s</code>") (verbatim . "<code class='verbatim'>%s</code>") (verbatim . "<code class='verbatim'>%s</code>") (bold . "<b>%s</b>") (code . "<code>%s</code>") (italic . "<i>%s</i>") (strike-through . "<del>%s</del>") (underline . "<span class=\"underline\">%s</span>") (verbatim . "<code>%s</code>")) org-ascii-format-drawer-function #[771 ".\207" [] 4 "\n\n(fn NAME CONTENTS WIDTH)"] org-agenda-loop-over-headlines-in-active-region nil org-src-lang-modes '(("arduino" . arduino) ("browser" . html) ("redis" . redis) ("php" . php) ("C" . c) ("C++" . c++) ("asymptote" . asy) ("bash" . sh) ("beamer" . latex) ("calc" . fundamental) ("cpp" . c++) ("ditaa" . artist) ("dot" . fundamental) ("elisp" . emacs-lisp) ("ocaml" . tuareg) ("screen" . shell-script) ("shell" . sh) ("sqlite" . sql)) org-src-preserve-indentation t org-occur-hook '(org-first-headline-recenter) org-cycle-hook '(org-cycle-hide-archived-subtrees org-cycle-hide-drawers org-cycle-show-empty-lines org-optimize-window-after-visibility-change) org-todo-keywords '((sequence "TODO" "STARTED" "WAITING" "|" "DONE" "CANCELED")) org-support-shift-select t org-speed-command-hook '(org-speed-command-activate org-babel-speed-command-activate) org-odt-format-inlinetask-function 'org-odt-format-inlinetask-default-function org-babel-tangle-lang-exts '(("perl" . "pl") ("emacs-lisp" . "el") ("elisp" . "el")) org-export-before-parsing-hook '(org-attach-expand-links) org-confirm-shell-link-function 'yes-or-no-p org-link-parameters '(("attachment" :follow org-attach-follow :complete org-attach-complete-link) ("id" :follow org-id-open) ("eww" :follow org-eww-open :store org-eww-store-link) ("rmail" :follow org-rmail-open :store org-rmail-store-link) ("mhe" :follow org-mhe-open :store org-mhe-store-link) ("irc" :follow org-irc-visit :store org-irc-store-link :export org-irc-export) ("info" :follow org-info-open :export org-info-export :store org-info-store-link) ("gnus" :follow org-gnus-open :store org-gnus-store-link) ("docview" :follow org-docview-open :export org-docview-export :store org-docview-store-link) ("bibtex" :follow org-bibtex-open :store org-bibtex-store-link) ("bbdb" :follow org-bbdb-open :export org-bbdb-export :complete org-bbdb-complete-link :store org-bbdb-store-link) ("w3m" :store org-w3m-store-link) ("file+sys") ("file+emacs") ("shell" :follow org-link--open-shell) ("news" :follow #[514 "\301\300\302.Q.\"\207" ["news" browse-url ":"] 6 "\n\n(fn URL ARG)"] ) ("mailto" :follow #[514 "\301\300\302.Q.\"\207" ["mailto" browse-url ":"] 6 "\n\n(fn URL ARG)"] ) ("https" :follow #[514 "\301\300\302.Q.\"\207" ["https" browse-url ":"] 6 "\n\n(fn URL ARG)"] ) ("http" :follow #[514 "\301\300\302.Q.\"\207" ["http" browse-url ":"] 6 "\n\n(fn URL ARG)"] ) ("ftp" :follow #[514 "\301\300\302.Q.\"\207" ["ftp" browse-url ":"] 6 "\n\n(fn URL ARG)"] ) ("help" :follow org-link--open-help) ("file" :complete org-link-complete-file) ("elisp" :follow org-link--open-elisp) ("doi" :follow org-link--open-doi)) org-latex-format-headline-function 'org-latex-format-headline-default-function org-export-allow-bind-keywords t org-link-elisp-confirm-function 'yes-or-no-p org-latex-format-inlinetask-function 'org-latex-format-inlinetask-default-function org-tab-before-tab-emulation-hook '(org-tempo-complete-tag) org-html-format-drawer-function #[514 "\207" [] 3 "\n\n(fn NAME CONTENTS)"] org-html-format-headline-function 'org-html-format-headline-default-function org-src-window-setup 'current-window org-indent-mode-turns-on-hiding-stars nil org-link-from-user-regexp "\\<br@lorien\\>\\|\\<Bruno\\>" org-publish-project-alist '(("org" :base-directory "~/org" :base-extension "org" :publishing-directory "~/dev/www/cf.bodi/org" :recursive t :publishing-function org-html-publish-to-html :html-head-include-default-style nil :html-head-include-scripts nil) ("static" :base-directory "~/org/" :base-extension "css\\|js\\|png\\|jpg\\|gif\\|pdf\\|mp3\\|ogg\\|swf" :publishing-directory "~/dev/www/cf.bodi/org/" :recursive t :publishing-function org-publish-attachment) ) )
#+TITLE: Lorem.org #+AUTHOR: Lorem Ipsum * Lorem Ipsum Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.