Whenever I turn around really quickly by moving the mouse fast it causes the whole game to freeze and I have to close it in task manager. Might want to look into it.

this has never happened to me. maybe its your computer.

I spent five minutes whipping my mouse around. No crashes, just a lot of motion sickness.

What is your computer spec?

looks like he fixed this in .42

He didnt. It got worse for me in .42

When I lower the DPI of my mouse in my mouse's configuration utility it doesn't seem to crash. So it's probably an issue with fast movements in the game.

i've had this crash once as well in 0.42, while falling down a hole looking down and spinning the mouse left and up at the same time
overflow? Floating Point Exception?

Actually it does seem to be happening less in 0.42. Good to see he's working on bugs like this.

pancakes, why not tell us what kind of computer you are running... how fast is the CPU and how much memory and what graphics card and stuff like that so we can better explain to you possibly why it isn't working. and so we can make fun of your computer.