I get exactly same as Jim - faults looking same as above example on random images. I have tried saving and opening in PSP result is the same. Yet I know others view same image and it is fine and I can return later and the image is fine.

And every one said, 'If we only live,
We too will go to sea in a Sieve,---
To the hills of the Chankly Bore!'
Far and few, far and few, Are the lands where the Jumblies live;
Their heads are green, and their hands are blue, And they went to sea in a Sieve.

Edward Lear
http://www.nonsenselit.org/Lear/ns/jumblies.html