Originally Posted by Opus
I am wondering if it is significant that the checksum for my original file is formatted differently, having a letter first? or not?
Nope, those are just hexadecimal renderings of 160-bit numbers. Ordering doesn't really matter, I just wanted to be sure that the version you had was really corrupt.
It was great detective work on your part figuring out that the file had somehow been corrupted. It's also incredibly weird. It's the first time I've heard of such an occurrence.