I am running org-mode 8.2.10 from elpa on Emacs 24.4. When I try to export to ODT format with the keystrokes described here:
http://orgmode.org/manual/ODT-export-commands.html I get an error. Indeed, when I press C-c C-e, ODT is not even mentioned among the formats that I can export to, I am offered only iCalender, HTML, plaintext and LaTeX. I remember being able to easily export to ODT in the past. Has this functionality been removed or moved to a separate package?