Gravel seems to fall a lot faster now! It got me in trouble while mining recently. You have to be super fast putting down a torch to do the gravel breaking trick now. I've fought skellies and zombies with armor on, where I never noticed that before.
The top textures of my people (The other wood blocks) have changed. (Though this might have changed in a previous update). Instead of all having the oak wood top texture, they have textures with the colors of their planks.
You can now mine and manipulate all blocks when riding a horse, pig, minecarts, etc... You now crouch to exit.
This brings me to a slight bug (maybe) regarding minecarts. My friend and I thought I was stuck in the minecart so he tried to break it out from under me. It wouldn't break, so I left the world, and the cart disappeared with me. When I loaded back into the world, I was still in the cart, but my friend was now able to break it and free me.
Also, mobs seem dumb again. A stood right next to a zombie for a long time while he just kinda looked at me before I finally hit him and brought him back down to earth. Then promptly sent him straight to hell
I believe some of the sound effects have been added and updated. Spiders now make a crawling noise (I've never heard it before the update, but it could just be me) and skeletons have a small additional sound when killed from what I've heard in game
Zombies seem to be able to pick up things now. I have seen some with shovels.
They are much more devious than this... I had a zombie villager in my trap, and was prepping the area for moving him. He picked up the sand block I broke, then somehow slipped (glitched) between fence poles and got out of the trap... But he made the mistake of punching me causing the 4 dogs that were sitting nearby to come and tear him apart. Had to try again the next night to get zombie villagers.