Feedreader version - 3.11 stable, the same issue with latest beta.
Windows version - 2000, build 2195, service pack 4.
Internet explorer version - 6.00.2800.1106.
I've got a problem with a specific feed - http://funkytorrents.com/rss.php?passkey=f72867596845e7c519d7907d251c5cfb - the entries shows up multiple times. Screenshot - http://img210.imageshack.us/img210/3494/funkytorrents2hs8.jpg.
BTW - when I reed this feed via Opera built-in client - it's all correct, so it's not a problem with a feed.