\listfiles
\documentclass[xcolor={dvipsnames},table]{beamer}
\begin{document}
\begin{frame}
\arrayrulecolor{black}% Commment to see cline
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Wombat& Low & High \\
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colortbl.sty & 2012/02/13 v1.0a &Color table columns (DPC)
\end{tabular}
\end{frame}
\end{document}