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It seems to me that in beamer, a (rounded) box with shadows that is covered (transparent, normally visible on the next slide) has buggy shadows, I'm not sure if this is a know bug, or maybe an error on my part.

My minimal code is the following

\documentclass{beamer}
\usetheme{Warsaw}
\setbeamertemplate{headline}{}
\setbeamertemplate{footline}{}
\setbeamercovered{transparent}
\begin{document}
\begin{frame}
\uncover<2>{
\begin{block}{Head}
Body
\end{block}
}
\end{frame}
\end{document}

Result

As you can see, the shadow seems to be above the box. It looks like this both in Acrobat Pro, Reader, and on Ubuntu.

Any ideas how I can get rid of it?

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closed as too localized by Joseph Wright May 2 '13 at 7:06

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1  
It looks fine in Mac OS Preview. Either it's a viewer-specific problem, or you should make sure that your LaTeX distribution is up to date. –  Jubobs Apr 30 '13 at 10:00
2  
I'm running pdfTeX 3.1415926-1.40.10-2.2 (TeX Live 2009/Debian) on Ubuntu/Lucid with evince 2.30.3 and it looks fine to me, as Jubobs suggested maybe you're running an older version? –  Bristol Apr 30 '13 at 10:17
    
It was indeed a version issue, only beamer version 3.18 installed on this computer I am using at the moment. With beamer 3.26 everything works fine, Thanks. –  Bernhard Apr 30 '13 at 13:20
    
On that basis, 'too localized'. –  Joseph Wright May 2 '13 at 7:06
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