Confirmed for 16w38a.
Fixed as of 15w37a.
Confirmed in 15w38b.
Can confirm.
Not happening for me.
Can confirm.
Savannah M biomes have always been crazy awesome. 🙂
That is not new, nor is it a bug. It was made that way in 1.8.
Can confirm.
Can confirm.
Can confirm.
When in creative, right clicking to equip armor doesn't use it up. This "duplication glitch" is creative only, so fairly pointless, eh? 😛
Can confirm. Also confirmed not intended:
You will need to respawn the dragon to get the new end features. Doing so may destroy things you've built in the end, so it's something you (the player) have to initiate.
Source: http://www.reddit.com/r/Minecraft/comments/3extko/will_19s_end_gateway_work_on_18_worlds/ctjejif
Can confirm, also affects ender dragons summoned via /summon.
Can confirm. It's also impossible to break the minecart with a Shulker in it, but that may be because of the large hitbox.
Edit: Also, when you take a screenshot, it snaps to one position.
Can confirm, very annoying.
Confirmed in 1.18.1