Entries dissappearing from matrix

[GoogleCodeExporter]

What steps will reproduce the problem?
Use the following code:
\documentclass[12pt]{amsart}
\usepackage[utf8]{inputenc}
\usepackage{amsmath}
\usepackage{amssymb}
\title{\LaTeX}
\date{}
\begin{document}
$$\left[\begin{matrix}0&1&0\\ 0&0&1\\ \end{matrix}\right]$$
\end{document}

Compile it.

What is the expected output? What do you see instead?
Notice a zero is missing in the second line.

What version of the product are you using? On what browser?
N/A, I've tried in a few different browsers.

Please provide any additional information below.
This problem has been present for a long time, and for many different matrices. 
In here I just posted a minimal example, but many of my documents have the same 
problem on different matrices.

Original issue reported on code.google.com by mra...@gmail.com on 15 Feb 2011 at 6:48

[GoogleCodeExporter]

I believe that only entries with zeroes in them disappear.

Original comment by shade...@gmail.com on 12 Mar 2011 at 7:52