I never knew why is this happening, this was a perfectly cut circle with Eliptical Marquee tool, and pasted on a new image.. Sometimes it's just flattens the edges like this..



I think it has something to do with those interpolation settings. When i cut it it's perfect circle, when i paste it on another file it sometimes gets these flatten edges instead of retaining it rounded.
But this is bothering me for a while now, it butcheres things so randomly sometimes..


