I just saved over a thousand pictures using the procedure described in this question. However, a few of the pictures have grey areas on them. the thumbnail displays the picture perfectly, but once viewed, the picture contains this grey block. I've tried Irfanview, which didn't help. I've also tried photorescue, which did kind of help, but, requires a key, that i tried to find on the net, but all have expired.
Is there any way to recover the lost JPEGs?