# Brace from {cases} environment disappears after rowcolors*{1}{…}{…}

I use rowcolors*{1}{...}{...} to color a table, then I use it again (with white as arguments) to reset the color. After that, braces look weird (they disappear slightly).

If I use scrbook, book, article (e.g.) the above error occurs.
If I use minimal, the brace looks normal.

Why is that, and what can I do to fix the error?

\documentclass{scrbook}
\usepackage[table]{xcolor}
\usepackage{amsmath}

\begin{document}
% rowcolors*{1}{...}{...} ommitted.
% TABLE ommited.
\rowcolors*{1}{white}{white}

$x = \begin{cases} y & z \end{cases}$

\end{document}

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Use a group to keep local the effect of \rowcolors: {\rowcolors*{1}{white}{white}\begin{tabular}{...}...\end{tabular}} $x= \begin{cases}...\end{cases}$. Or is it the equation inside the table? –  Gonzalo Medina Dec 14 '12 at 22:58
Welcome to TeX.sx! A tip: You can use backticks  to mark your inline code as I did in my edit. –  Torbjørn T. Dec 14 '12 at 23:03

I think it's one of those undocumented features. This works

\documentclass{scrbook}
\usepackage[table]{xcolor}
\usepackage{amsmath}

\begin{document}
% rowcolors*{1}{...}{...} ommitted.
% TABLE ommited.
\rowcolors*{1}{white}{white}

$\csname CT@everycr\endcsname{} x = \begin{cases} y & z \end{cases}$

\end{document}
`
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