According to Retraction Watch (where it says: “It’s not clear whether these alleged manipulations are central to the claims of the paper. We’ll keep an eye on this and update as we learn more from Cell.”) , the human embryonic stem cell cloning paper in Cell by the Mitalipov Lab (I blogged about it here last week) cropped and reused some images, a potentially major issue.
See also the
discussion by the peers of the
paper where you can also see the images (figures) that the peers refer to.
This post looks on image-use in scientific papers including a museum’s perspective.