Hello,

  I'm trying to use org-beamer to create a presentation.  I'm following the
Worg tutorial, but I've found that surrounding a word with '@' does not
properly translate to the alert directive in Beamer.  Whenever I place a
word in '@'s, they pass through directly to the presentation.  For example
instead of @alert@ translating to a bold red alert in the output
presentation, I just get the string "@alert@".  Any idea why this might be
happening?  I also grabbed the example presentation from the git repository
and noticed the same issue with that.

Thanks,
Rob