# Beamer compiles but does not produce any output

I'm trying to make slides with the beamer package. When I compile, it finishes successfully but does not produce any pages other than the title slide. When I remove the \maketitle, then no pages are written! TeX ends with "No pages of output." The surprising bit is, just this morning I made another presentation with no problems at all. To me this feels like a problem with my installation, but I have not fiddled with the installation in any manner since this morning. I'm using XeTeX 3.14159265-2.6-0.99991 (TeX Live 2014).

Here is a MWE:

\documentclass[presentation,smaller]{beamer}
\usepackage{fontspec}
\usepackage{fixltx2e}
\usepackage{microtype}

\usepackage{appendixnumberbeamer}
\setbeamertemplate{footline}[page number]
\institute{Institute}

\usetheme{Montpellier}
\usecolortheme{orchid}
\author{Suvayu}
\date{\today}
\title{Testing mysterious no output}

\begin{document}

% \maketitle
I should be printed
\end{frame}

So should I
\end{frame}

\end{document}


Unfortunately, I have to finish this by tomorrow. Any immediate help would be greatly appreciated.

The : messes up the argument. Leave it out or wrap the label in {}:

This works:

\documentclass[presentation,smaller]{beamer}
\begin{document}
I should be printed
\end{frame}
\end{document}


And this one too:

\documentclass[presentation,smaller]{beamer}
\begin{document}
I should be printed
\end{frame}
\end{document}