Looks great the new plugin. Much, much improved readability with just some small modifications of the display! Super!
Will have to wait and see for a while about the issue on "posts not showing" (other thread).
Here's one other strange thing though:
A post from a feed appears in duplicate on the page.
This is my feed display page with the new plugin (and with WP 3.5.1).
A bit down from the top, currently in position 7, there is this post "Traditonal Swedish Ox tail soup. Vinblogg: Testimony of a wine junkie | Publicerat 2013-03-16"
It appears twice in the list, in position 7 and 8 currently.
In the blog feed the post appears only once.
In my list of All Feed Sources the source appears only once.
I think I have seen this behaviour already before the upgrade to version 3, so I am quite sure it was something that happened already before. (I remember having seen it for the same source actually.)