Ocassionally, some of the feeds Margaret used contain at some point invalid utf-8 characters which leads to that truncation she mentioned.We are trying to overcome it and find a fix on our side, but this is not really our bug. The issue does not exit in WP 3.0.
I can confirm this as I installed this on a totally clean wordpress 3.0 install, and it behaves in exactly the same way.
So it appears that this plugin has some issues with certain utf-8 characters. Whenever a RSS feed contains one of these it truncates the feed at that point.
Seems like someone should be able to come up with a hack to fix this.