Strange, I tested the URL you mentioned, and it works without any problems for me.

Could you run "/usr/lib/podsync/sync_podcast.sh http://static.orf.at/podcast/oe1/oe1_journale.xml 2" from a terminal on your N800, and send the output to me?

Also I've updated podsync to 0.0.6 for OS2008 only, maybe that solves the problem. (Download from http://www.wsys.nl/podsync/Podsync-0.0.6.all.deb)