From mboxrd@z Thu Jan  1 00:00:00 1970
From: Michael Bach <phaebz@gmail.com>
Subject: LaTeX export: Handle hash symbol in footnote url links
Date: Fri, 21 Feb 2014 11:52:14 +0100
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Dear org-mode Devs and Users,

I am trying to export the following snippet

#+BEGIN_ORG
* LaTeX export of url with hash symbol

The Org mode export facilities can be used to export Org documents or
parts of Org documents to a variety of other formats.[fn:1]

* Footnotes

[fn:1] [[http://orgmode.org/org.html#Exporting]]
#+END_ORG

Now the exported .tex file contains the link as
: \footnote{\url{http://orgmode.org/org.html#Exporting}}

Which LaTeX does not like:
: Illegal parameter number in definition of \Hy@tempa

FWIW, there is a workaround for the percent symbol described on SO[1]
using `\urldef` - but this does not work with the hash symbol.

Is there another workaround/solution that works with org-mode?

[1] bit.ly/1cwYJaM