It's a nitpick but I wish everyone stopped spelling it like that and call it Actually Portable Executable at least. That kind of spelling really messes up with my reading comprehension, and I think it does for many people.
I use a magic string somewhere, which has control codes, three ASCII digits for versioning, and an RTL UTF-8 character, and is exactly eight bytes wide.
Anything munges my file, I'll know. Meanwhile I can just mask it.
I would not call it a shibboleth, but vague, generic terms are known to be for most purposes unsearchable, and having a really unique string identifier for your thing could make it more valuable.
It reminds me of this other HN link:
Of course, I am sure some screen readers will simply take a custom text preprocessor that will turn l337sp34k and similar spellings like this one into regular text, but I am certain none of them have it as the default.
What other term would people suggest then? Surely it's a real concern for projects to be easily accessible by people looking for them.