Hello, Today, I've observed that code disappears when hitting TAB (C-h k reports it's bound to org-cycle) in a code block.
ECM: --8<---------------cut here---------------start------------->8--- * Org-cycle #+begin_src org #+LaTeX_CLASS: beamer #+LaTeX_CLASS_OPTIONS: [presentation] #+BEAMER_FRAME_LEVEL: 1 #+BEAMER_HEADER_EXTRA: \usetheme{default}\usecolortheme{default} #+COLUMNS: %45ITEM %10BEAMER_env(Env) %10BEAMER_envargs(Env Args) %4BEAMER_col(Col) %8BEAMER_extra(Extra) #+PROPERTY: BEAMER_col_ALL 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 :ETC #+end_src Hit =TAB=, for example on the first # char from the first line, and your code disappears: #+begin_src org C #+end_src --8<---------------cut here---------------end--------------->8--- Instead, hitting TAB should have protected the Org code by prefixing dangerous lines with a comma... Org-mode version 7.9.2 (release_7.9.2-486-g4bb5a0 @ d:/home/sva/src/org-mode/lisp/) Best regards, Seb -- Sebastien Vauban