So you can see some types of images. . . hmmmmmm.
My pics in the sweatshirt Thread are "Jpegs"
maybe youve lost the codec to display certain image types.
Have you recently installed or re-installed any software ??
because it's possible that in the settings for that software are set with only certain image types enabled. . . .
Just rambling here, trying to think what updates or new software would have those settings. . . hmmmmm
Aaarrrgghhhh I know what it is I just can't think what the damn thing is called.