Ok, so has anybody heard of a Minecraft 1.8.1 jar file that contains "Special" content?

Ok what are you abbreviating when you say "special"?

considering I'm in the jar all the time and have seen every file in the jar I can tell you this is false.

I've heard that there was a MC jar with other "unworldly" things "(Enormous STONE BRICK castle in the nether with strange NPCs)

No no, inthepastxx, there was some rumor about special MC jars that were released "only from notch" apparently, my guess was that when the people downloaded it, it was a randomized dropbox download. That is just my guess. Ever heard of a Cassidy rumor? (MC that is apart of the myth)

Ok. now Im going insane. On my server (Im currently the only one that can get on) There are random trees cut down, its a brand new world, and an entire forest is GONE. probably a glitch. But, am I going insane?

This is why its a "myth" as well just like herobrine was a myth that was never actually in the game.

Ah. But wait a second, What if, the difference is not in the files, but the .Class coding.

And, the trees, is that just my insanity.