I would like to use the wasysym package to get access to characters such as lightning and clock. However, the following MWE for me gives different symbols.
\documentclass{article}
\usepackage{wasysym}
\begin{document}
$\lightning\clock$
\end{document}
This results in the following when I run pdflatex on it.

That is, lightning is instead rendered to a backtick and clock is instead rendered to a 0.
I have TeXLive 2012 on Ubuntu 12.04 and the same shows up when using Evince or Okular to view. I do not know if this is a problem with my LaTeX code or with my TeX installation or some encoding problem particular to my machine.

