Yet More Ways the Literature Can Mislead Us, by Howard Brody at Hooked (a blog on ethics, medicine, and pharmaceutical companies). I would summarize these new ways, but then you would click through, would you? So do it -- read it here.
I didn't realize Paul Pronyk left his position (head M&E person) with the Millennium Villages Project just after the recent flap over the Lancet paper (and its partial retraction). Retraction Watch has coverage here and here.