When I try to upload this image as part of a question, I am told Failed to upload image; the format is not supported
:
https://commons.wikimedia.org/wiki/File:The_Royal_Navy_during_the_Second_World_War_A24702.jpg
Same after I download it, and same after I convert it to PNG.
Is there some new rule that forbids images of this size/format/something, or is it a bug with the server, or a bug with me?