Hello,
I can reproduce your error but a setting without #+BEGIN_SRC
#+END_SRC seems to work. It not a fix just a way around the problem.
Hope it helps,
Jeremie
#+TITLE: Test d'export tikz qui ne marche plus
#+DATE: <2015-11-10 mar.>
#+LANGUAGE: fr
#+OPTIONS: toc:1 num:1
#+LATEX_HEADER: \usepackage[utf8]{inputenc}
#+LATEX_HEADER: \usepackage[T1]{fontenc}
#+LATEX_HEADER: \usepackage{lmodern}
#+LATEX_HEADER: \usepackage{tikz}
#+OPTIONS: H:3 num:t toc:nil \n:nil @:t ::t |:t ^:t -:t f:t *:t
tex:imagemagick title:nil author:nil date:nil
* Récapitulatif
\usetikzlibrary{trees}
\begin{tikzpicture}[thick,level 1/.style ={sibling distance=30mm},%
level 2/.style={sibling distance=25mm},%
level 3/.style={sibling distance=10mm}]
\node {racine-par-defaut}
[edge from parent fork down]
child { node {haute-par-defaut}
child { node {rubrique1}
child { node {a}}
child { node {b}}
child { node {c}}
}
child { node {rubrique2}
child { node {d}}
child { node {e}}
child { node {f}}
}
child { node {private}}
}
child { node {site1}}
child { node {site2}
child { node {zone protegee}}
}
;
\end{tikzpicture}
\begin{tikzpicture}[ grow=0, nodes={draw}, sibling distance=0.6cm, ->]
\node{n=0}
child { node {G}
child { node {G} }
child { node {P} }
child { node {D} }
child [missing]
child [missing]
}
child [missing]
child [missing]
child { node {P}
child { node {G} }
child { node {P} }
child { node {D} }
child [missing]
child [missing]
}
child [missing]
child [missing]
child {node {D}
child { node {G} }
child { node {P} }
child { node {D} }
child [missing]
child [missing]
};
\end{tikzpicture}