I have now, a year's experience with paint.net, and every time I use an image and past it on to my image, I try to feather the image, so the pixely lines around the image will soften, but every time I try it just shows white lines, which is not what the plug in was made for.
Here are some pictures to explain my problem. Also when I use Gaussian blur plus, that makes it good,but its still very pixely. This has happened a lot. I want my picture to have smooth edges.
and after: