If the rst2html procedure of the rst external plugin returns None (e.g. when it throws an exception), then ikiwiki will render
<div id="content">
2/8
</div>
In addition to the broken plugin, this seems like a bug in ikiwiki, which should probably output an informational message about the plugin returning an invalid value.
--madduck
done, I made it print the thrown error message to stderr, and return "", which seems better than dying of the thrown error entirely. --Joey