Comment 10 for bug 1888033

I just realized Kai has already indirectly referenced the link I mentioned.

These are two new (old) data points:
https://www.reddit.com/r/debian/comments/aflkdv/strange_error_while_check_the_cdroms_integrity_on/
Affecting ubuntu 18.10 Desktop
https://askubuntu.com/questions/404035/the-boot-grub-efi-img-file-failed-the-md5-checksum-verification
Affecting ubuntu-12.04.3-server-amd64.iso