I'm stuck at step 4 of the tutorial. The image is outlined and blinking, with the border around the whole picture blinking, so I hit Contol I, to invert the image and then hit delete on the background layer, to get rid of the background. But every time I'm left with a transparent cutout on the transparent new layer. I have followed the steps, but I'm missing something. Somebody please help this lowly, confused grasshopper.