I have a MikTeX 2.9 distribution installed on Windows 7 with PGF 2.10 and tikz and I get a hundred errors at compilation no matter how many dollar sings I use to surround the diagram environment:
\documentclass[12pt]{article}
\usepackage{tikz-cd}
\begin{document}
$$\begin{tikzcd}
0
\end{tikzcd}$$
\end{document}
Upon compilation, I get missing dollar inserted, then missing } inserted, then giving up on this path; did you forget a semicolon?, missing }, missing endgroup" and after that kind of 90 "misplaced \cr. Even more, lots of generic\pgf files seem to be loaded. As I said, I tried removing the dollar signs; to no avail.
I mention that tikz-cd diagrams worked very well until now, but they've surely done something with this update. Some files were downloaded today, before I decided to show you this "minimal file", and with the ridiculous "documentation" on this project's site I can't do anything but ask for help.
pdflatexon my system (same as yours). – Herr K. Dec 05 '13 at 18:29$$...$$, but rather\[...\]; but other than that I don't see any reason for strange errors. – egreg Dec 05 '13 at 18:51