Most/all blocks turn see-through at random causing game unplayable

I was playing in 13w42b, in my survival-test world, walked down a few steps, and then everything but a few blocks went see through. (see screenshot)

No idea how to reproduce, but see attached logs and options.txt.

Note: It happened in 13w42a as well, used 13w42b for logs and scrsh. Makes game unplayable