I found a bug related to the responsiveness of blog summaries on mobiles:
The round images on post summaries are getting cropped before they get fully responsive. Unfortunately, it is visible exactly at the width of most mobiles (320) in portrait mode--see simulation of themesandco here--scroll down to see all the cropped cirlces.
I suppose there's a very easy solution, which would be to wrap the summaries in a row-fluid div (though there may be some re-ordering to do, to account for the alternating side-positioning of the circles).
Is it too late for this to catch 3.0.9?