1) Any in-game music playing when adjusting Mipmap level stops immediatly
2) Block breaking animation does not display on block (the lines that come out of the centre when you are hitting a block) (I used a few different blocks and tools)
3) Urm... http://i.imgur.com/N9uj53Q.png I have no idea what caused this, I was fiddling with the new Video Options and that happened.

Here's another picture of No. 3 without the HUD: http://i.imgur.com/CRnp6kn.png

IGNORE NUMBER 3, I KNOW IT'S NOT A BUG NOW! Hehe, Super-Secret Settings...