Bug#501520: latex flashcards and geometry

[karl@freefriends.org (Karl Berry)]

Regarding 
  http://bugs.archlinux.org/task/20065?dev=1047
  http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=501520
  http://www.feferraz.net/en/P/Flashcards_in_LaTeX

Unfortunately Fernando's patch apparently no longer works with the
current geometry.  I get:
./flashcards.cls:88: Package keyval Error: compat2 undefined.

If I remove the compat2, I get this error (among several others):
./flashcards.cls:88: Undefined control sequence.
\@tempa ->\cardpapermode

It also seems like geometry's resetpaper option should be usable instead
of paper=letterpaper, but it didn't work for me -- still got 
.. Package geometry Error: \paperwidth (0.0pt) too short.

So I don't plan to do anything more about this.  I'll leave the broken
flashcards in TL in hopes that someone else will notice and delve into
what it is actually going on; I doubt it is deep.  (Fernando, if you
have any interest in looking into it, that'd be great.)

For the record, this was my test file.

\documentclass{flashcards}
\begin{document}
\begin{flashcard}{hello}
world.
\end{flashcard}
\end{document}

Best,
Karl