The Selection and Mask filter is not functioning properly at all. I have an iMac and when I go to this filter, here is what typically happens. I'll make an initial selection with the Quick Selection tool. But when I go to refine the edge, it makes the selection much worse, not better! Also there seems to be a bug with viewing the Onion Skin mode. It only changes the transparency in the small pic in the Properties section, but no change appears in the photo itself. Any suggestions?