I did n stable and got 0.6.18. I canceled the 0.6.18 install and now I can't get rid of it. n rm 0.6.18 silently fails.
n rm 0.6.18
Now node -v gives me v0.6.18. I don't know if I had 0.6.18 before. I will install n stable again and hopefully my node will be ok.