# tikz-qtree and tikz trees not playing nice with each other

I have the following problem: I have tikz with tikz-qtree installed. Hence, if I draw a tree with q-tree it works perfectly. However, I have to recycle one drawing done without q-tree, so that the code looks like

\documentclass{article}
\usepackage{tikz}

\begin{document}

\begin{tikzpicture}[every node/.style={circle,draw},level 1/.style={sibling distance=30mm},level 2/.style={sibling distance=10mm}]
\node {A}
child { node {B}
child { node {E} }
child { node {F} child { node {K} } child { node {L} } child { node {M}}}
child { node {G} }}
child { node {C}
child {node {H}}}
child { node {D} child {node {I}} child {node {J} child {node {N}} child  {node {O}}}}
;
\end{tikzpicture}
\end{document}


This usually works if you don't have qtree installed, but if you do, then the level distance is ignored and the third level nodes z1 and t1 will overlap with each other. Is there any quick solution for that?

TIA!

-
Welcome to TeX.sx! Please add a minimal working example (MWE) that illustrates your problem. I had to make several changes to your code to get it to compile and when I did then I found no difference in placement of the nodes. It's more than likely that the changes I made were significant so a compilable example would really help here. –  Andrew Stacey Jun 11 '12 at 9:04
First you need to replace \node by node –  Alain Matthes Jun 11 '12 at 9:32
I'm without a compiler at the moment, but I just copypasted a standard example here from SE, since I tried, and it doesn't work if you have \usepackage{tikz-qtree}. Then you remove it, and everything magically works. Sorry for this. –  Alessio Jun 11 '12 at 9:49
Not a problem! It's just so that folk can best help. Which version of tikz-qtree are you using? Also, now that you have 11 reputation here you can upload images - that would be extremely useful as I'm still getting no difference in the positioning. –  Andrew Stacey Jun 11 '12 at 9:56