So here we are,

The package provided in (X)ubuntu 13.4 is this one : "GNU Emacs 24.2.1 (i686-pc-linux-gnu, GTK+ Version 3.6.4) of 2013-04-09 on komainu, modified by Debian".

I tried "C-h f url-encode-url RET" but wihout the expected results.

I tried to find something with google and I seems that the version of Emacs must greater than 24.2.1. 
I used the PAA for Damien CASSOU, install Emacs 24.3.1. The command 'url-encode-url' was listed in.

I tried both org-rss-export-as/to-rss and it worked. I also tested the  org-publish-project-alist approach with success.

So my problem comes from the Emacs version. Thanks for your help!


2013/7/11 Bastien <bzg@gnu.org>
flammable project <flammable.project@gmail.com> writes:

> Any ideas?

Can you check if you have `url-encode-url'?

C-h f url-encode-url RET

will tell you.  It is an autoloaded function, so you
don't need to (require 'url-util), but if you can browse
your Emacs sources, it should be in there.

HTT,

--
 Bastien