# Beamer frames show a white line on top

I want to make a presentation with the beamer class. However, there appears an annoying white horizontal line on top of all pages except the first one. The line thickness is only about 1mm, but it looks ugly anyway. The bug can be seen in this short example:

\documentclass{beamer}

\RequirePackage{type1cm} % font

\useoutertheme{miniframes} % colored top to show the white line
\useinnertheme{default}
\usecolortheme{albatross} % dark color to show the white line

\begin{document}

\begin{frame} % no white line
\titlepage
\end{frame}

\section{section1} % white line
\begin{frame}{test}
test
\end{frame}

\section{section2} % white line
\begin{frame}{test2}
test2
\end{frame}

\end{document}


I would like to remove this white line.

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I can't see any white line there –  Thorsten Jan 24 '12 at 13:51
In Sumatra PDF that is usually the case but Adobe Acrobat does not show that line. Hence, it's probably a reader issue. –  percusse Jan 24 '12 at 14:02
For me, Adobe Acrobat Reader as well as Ocular show this line. By the way, I use beamer.cls 2011/09/12 development version 3.12. –  john Jan 24 '12 at 14:07
I've only Adobe Acrobat on my computer (v. 10.1.2). I'm using the same version of beamer as you do. –  Thorsten Jan 24 '12 at 14:12
Adobe reader 9.4.2 and kpdf 0.5.4 (I know, superold) both don't show a white line. –  Roelof Spijker Jan 24 '12 at 14:30

Definitely the reader. Comparing TeXworks' built-in viewer (0.4.3 r858), Sumatra 1.9, and Adobe Reader 10.1.2 on the same PDF:

Though I don't think it makes any difference for the question:

1. TeXworks and Sumatra were zoomed to 800%, and Adobe Reader to 700%. They look comparable in terms of how high the blue bands are, but I'm not sure why the percentages differ.

2. I'm seeing the white line on frame 1 as well.

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Thank you for these efforts. After experimenting, I am pretty sure though that it is not caused by the reader. I built the code above on another machine and looked at the resulting pdf on my machine - no white bar was visible. When I build it on my machine, the white bar comes visible. And only on page 2 and the following. –  john Jan 24 '12 at 16:06
Try to end all lines by a percent sign to make all the end-lines and leading whitespace removed. It could have helped. –  yo' Jan 24 '12 at 16:09
Good idea, but no change. That's how it looks for me, by the way: img844.imageshack.us/img844/520/presentationlu.png –  john Jan 24 '12 at 16:14
Also, on the same PDF as shown above, Sumatra reads the frame size as 5.04x3.79 inches, while Adobe reads it as 5.04x3.78 inches -- there are definitely differences in how the readers interpret the same PDF. –  Mike Renfro Jan 24 '12 at 17:26

No, it's not the reader but a problem with pgf and beamer. It was solved some time ago, so update both packages.

This issue was reported here a here

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