Defective Digital Images

Recentley I've had several PSD images with similar defects, when opening them! Any ideas about possible source (s) of the problem?

PS They were OK when downloaded from the camera!

What do you mean by 'OK when downloaded from the camera'? I assume that you mean that the thumbnail was OK.

Memory card going bad? Computer harddisk going bad?

PSD is a PhotoShop format, most suited for saving 16bit images as master files when they include layers and other PhotoShop specific elements ... How did your camera files become PSD? If you explain exactly what steps you have used right from copying them from your camera that would help us to find the problem.

I should have said the image loaded OK from the Memory Card!
I adjusted the image in PS Elements 10, and Saved it OK. The problem occurred when I opened it a few days later.

Did you copy from the SD card and then save the edited PSD on a computer? If so then do you still have the original camera file on the card. Or did you edit the file and save it back to the original SD card, overwriting the original? It may be a corruption caused by writing to the card in that case. Best practice would generally be make copies from the card to the computer, and save the edits on the computer, leaving the originals untouched on the card until backed up and then reuse the card. But then I'm not sure if this is perhaps what you have done?

" Best practice would generally be make copies from the card to the computer, and save the edits on the computer, leaving the originals untouched on the card until backed up and then reuse the card. But then I'm not sure if this is perhaps what you have done?"

Yes McGregNi this is whatI did!

If your original on the computer is still OK, my first suspect would be the harddisk. Download diagnostic tools from the website of the manufacturer of the harddisk and run them.