[Mailman-Users] Archive page not showing dates properly

[Peter Wetz]

On the archive page of my mailman list the dates are not showing up
properly. It looks like this: http://i.imgur.com/IrmWnie.png

As you can see, instead of the date a string "%(date)s" is shown. It is
also worth noting, that it already worked properly. However, suddenly (at
least I cannot state when exactly) it stopped working and since then dates
are shown as seen in the screenshot.

The archives are generated with Pipermail 0.09 (Mailman edition).

How can I fix this problem?

Thanks and best,
Peter