When exporting org files to .md files using the ox-md.el backend, links
like
[[file:other-file.org]] are translated to other-file.html.

I would expect this to be other-file.md instead. As it stands exporting
multiple files to markdown doesn't allow easy interlinking between them.
This can be worked around by defin-ing:

+BEGIN_SRC
 :html-extension "md"
+END_SRC

in the exporting project. But I think this should be fixed in the
=org-md-link= function.

I am using the following versions

GNU Emacs 24.3.1 (i386-mingw-nt6.1.7601) of 2013-03-17 on MARVIN
Org-mode version 8.2.5h (8.2.5h-19-g0ceb68-elpa @
c:/Users/a156712/.emacs.d/elpa/org-20140210/)

Regards,
Mark