Updated / Corrected Scenarios

[TheFlyingPhoton]

Have scenarios ever been corrected or edited after their release?

If so:
Sometimes when I GM, an event organizer will send me the pdf for the game (usually when I get asked to run a game last-ish minute that I wasn't planning to run when they're short on GMs). Is there any way to tell if a scenario has been updated? There doesn't seem to be any kind of "xth 'printing'" or "updated on [date]" or "version 1.x" kind of thing on the credits page. If they were ones I purchased, it would be easy to tell such a thing because the "My Downloads" page has "Date Last Downloaded" and "Date Last Updated" clear to see.

What made me wonder about this is having played (but not run) some former specials/exclusives that were later made into regular season scenarios. I've received chronicle sheets for those types of scenarios that had the new scenario number at the top and I've received chronicle sheets that still said "Exclusive" at the top. Also, after playing Eyes of the Ten, I compared notes with someone who played it a few years ago, and our chronicle sheets were different.
Now, obviously, the header of a chronicle sheet is no big deal, but I do have to wonder is there's anything that gets changed that might be critical to how the scenario gets run.

[DrParty06]

AFAIK, minor changes have been made to the couple exclusive scenarios that were later released during seasons, i.e. Midnight Mauler, Cyphermage Dilemma & Day of the Demon, but that's all.

[Mystic Lemur]

Sending pdfs:

Sending someone a pdf is frowned upon. A printed copy is fine, as is gifting the scenario to someone else's Paizo account. If you send a pdf with your watermark to someone else and it later gets posted on the interwebs, it's your account that gets flagged.

As to your question, generally the scenarios don't get updated except in the case of glaring, material errors. And even then, there are some scenarios from Seasons past that we've just been told to run "as-is" despite the errors.

[TheFlyingPhoton]

I've been sent pdfs only a couple of times if, like I said earlier, I get asked to run instead of play at the last minute, like the night before. So it's either that or I run it cold.
And there have been times I've run a PFS-at-home-game where one of the other players had the scenario pdf and I just ran it off of his tablet.

What got me wondering was comparing notes with people who have played certain scenarios long before me. I've noticed small changes on chronicle sheets, so is that all that gets altered? So Season 5 will be forever typo-ridden and players will still be making Swim checks to break down doors in 2023?

[Deussu]

During Season 0 I remember crying out about some near-impossible challenges, which then were tuned down.

#6 Black Waters:

In subtier 1-2 there was an allip (remember this was D&D 3.5) instead of the bugbear.

#26 Lost at Bitter End:

This one featured two Hellcats on subtier 7-8 and five hellcats on subtier 10-11. These numbers were decreased to one and three, respectively. The CR didn't take their favorable terrain into account.

Other than that, I haven't seen more edits. Among the Dead, as far as I know, still says "Among the Living" in its chronicle sheet. Rather shameful, I might say.