XeLaTeX rotating my figures in Beamer

Question

Whenever I compile my beamer presentations with xelatex, it forces any .pdf figures I've included with \includegraphics to rotate 90 degrees. If I compile with pdflatex or lualatex, I do not have this problem. Has anyone else seen this issue and/or know how to fix this?

For example, if I compile the following .tex code with lualtex, the sizing and positioning of fig1.pdf is as I expect. If I compile with xelatex, the figure is rotated by 90 degrees.

\documentclass{beamer}

\usepackage{fontspec}
\setsansfont[Ligatures=TeX]{GillSansMT}

\begin{document}

\begin{frame}
\frametitle{Frame Title}
\includegraphics[width=0.5\textwidth]{fig1.pdf}
\end{frame}

\end{document}

Compiling with xelatex also outputs the message

<use  "fig1.pdf" > [1] (./slides.aux)
** WARNING ** << /Rotate 90 >> found. (Not supported yet)
 )

Answer 1

The best approach here is to reprocess the PDF file using GhostScript, which will rewrite it to be 'well behaved':

gs -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dPDFSETTINGS=/screen -dNOPAUSE -dQUIET -dBATCH -sOutputFile= 

(Linux will have GhostScript installed, Mac users will probably have it as part of MacTeX but Windows users will need to download and install it.)

Answer 2

I did manage to find a work-around for this. If I convert my .pdf image to .ps using pdf2ps and then convert it back to .pdf with ps2pdf, the figure is properly oriented when compiled with xelatex.