1. Here is screenshot of my configuration: http://s12.postimage.org/pvosmex71/RSS_Importer_Config.png
2. I use this shortcode:
[wp_rss_multi_importer category="1" showgroup="0" thisfeed="20" hdsize="14px" datestyle="font-style:italic;font-size:10px;color:#8F8F8F"]
3. I've not changed anything in PHP code.
4. You can reproduce it using this feed: http://code.google.com/feeds/p/wot-xvm/downloads/basic