Reece Broughton

I am also experiencing chunk rendering issues in 14w21b.

After looking at some of the above comments I tried turning Advanced OpenGL off, and the issue stops!

System Specs: Ubuntu Linux (64bit) Java version "1.7.0_55" OpenJDK Runtime Environment

Turning off Advanced OpenGL is a temporary fix for this bug! (For me at least)

My Minecraft 14w18a crashes when logging into a world with item frames or when an item frame is placed as well. (Submitted crash report to Mojang through the launcher)

This internal exception seems to happen to me using any new world I create in the snapshot 14w03b, Single player or multiplayer.
I create a new world in creative mode, I find the end portal using eye's of ender. I go to the end. Stay in the end for a while and then the server freezes!
P.S. I start throwing snow balls to see exactly when the server stops responding.

Thanks for the information! I was able to get minecraft to run by updating the LWJGL files to a nightly build (2.9.0).