Podcasts get redownloaded constantly - duplicate episodes

[bietiekay]

Hi,

I am trying to use my SubSonic to download my podcasts. Everything works so far, but SubSonic never seems to stop downloading. It redownloads almost all episodes even when they are not new and it already has them.

Sample podcast url: http://www.cczwei.de/rss_tvissues.php

Is that a known problem?