I also have a problem with pasting but a different one to that already mentioned. When pasting an image as a new image, PDN asks me if I want to expand or keep the canvas size. It's going to be a new image, so that IS the new canvas size anyway... And then, no matter if you click expand or keep, it pastes the new image with one extra column of pixels (all transparent) to the left of the image, and occasionally one extra row at the bottom.