# Grey-ish balls below and beside title box in beamer presentation

I have successfully used beamer for many a presentation, but there is a small blemish that I would like to resolve/fix. When I use theme Boadilla and color theme crane, on my title page, at the bottom left and the top right the orange frame surrounding the title, there are small grayish circles (gradient color, half sitting 'under' the orange frame). These are ugly!

How do I make them go away? What causes them to begin with?

\documentclass{beamer}

\usecolortheme{crane}

\title[CS/SE 2S03]{Principles of Programming}

\begin{document}
\begin{frame}
\titlepage
\end{frame}
\end{document}


\setbeamertemplate{blocks}[rounded][shadow=false]


but that does not work either. I will upgrade my distribution too, but it would be nice to have a workaround that works now.

• Compile with latex > dvips > ps2pdf rather than pdflatex. – Werner Sep 10 '13 at 19:31

Using my crystal ball you have the viewer problem given in

http://www.latex-community.org/forum/viewtopic.php?f=5&t=7427

https://github.com/josephwright/beamer/issues/142

As far as I understand the transparency and shading issues with PDFs you are better off with a different viewer (I use SumatraPDF) and up-to-date beamer version doesn't show this problem. Thus, it is almost definitely a viewer problem. Using the PS->PDF way is another solution but if you have too many blocks file size will increase a lot and some PS printers will refuse to print your slides.

• ...and the solution is: latex > dvips > ps2pdf. – Werner Sep 10 '13 at 19:17
• @Werner I think Joseph fixed the issue already. So it should work as is. – percusse Sep 10 '13 at 19:17
• So is an update of the OP's distribution required and that's it? Is this too localized then? – Werner Sep 10 '13 at 19:19
• @Werner Crystall Ball says yes (or a different viewer). I wrote the answer to provide a shortcut to the coming discussion. If it is so I'll delete this. – percusse Sep 10 '13 at 19:20
• @percusse: +1 for using the crystal ball ;) – Claudio Fiandrino Sep 10 '13 at 19:25