Beamer buttons change zoom in Adobe Acrobat [closed]

Question

I am using Beamer to create slides (the editor I'm using is Bakoma Tex). I can add buttons to go back and forth between slides using the \hyperlink command. When I open the slides as pdf (in Adobe Acrobat Professional 8), the buttons appear and work as intended; but when I press on them, the zoom in the destination slides changes. This messes up full screen views.

I presume it is an issue of the settings in the viewer, but I need to fix this isue and I have no idea how to do it. Here is a short example of what I have:

\documentclass[xcolor=dvipsnames,serif]{beamer}

\usecolortheme[named=Maroon]{structure}

\usenavigationsymbolstemplate{}

\mode<presentation>
\usetheme{Pittsburgh}
\usepackage[sc]{mathpazo}
\usepackage[T1]{fontenc}
\usepackage{amsthm}
\usepackage{amsmath}
\usepackage{amssymb}
\setbeamercovered{transparent}
\setbeamertemplate{footline}[frame number]
\setbeamertemplate{items}[default]

\begin{document}

\title{My Example}

\begin{frame}

  \titlepage

\end{frame}

\begin{frame}\label{back again}

\frametitle{Slide 1}

\begin{itemize}

\item

Starting point. \hyperlink{there}{\beamergotobutton{To Slide 2}}

\end{itemize}

\end{frame}

\begin{frame}\label{there}

\frametitle{Slide 2}

\begin{itemize}

\item

Ending point. \hyperlink{back again}{\beamerreturnbutton{To Slide 1}}

\end{itemize}

\end{frame}

\end{document}