In the third picture, if you look in the bottom left and right corners, you can see a sudden colour change along the lines where the original picture's content ended. On the right, for example, the original cloud is sort of yellowish, then it suddenly becomes a more neutral grey along a diagonal line.

In the sky it's harder to tell, but it's still there too.

I actually posted that to hackernews a while ago: http://news.ycombinator.com/item?id=1221594 and it got only 5 votes. I guess the story title really matters.

Except those aren't actually the original picture. That's the picture with the trash already removed.

Not that I'm saying Gimp can't do as good of a job. It's exactly the same technology based on the same research. But I am saying that blog post is a tad dishonest.

Isn't it the exact same algorithm? The differences are probably only to do with how things are selected.