Playing since 15w39c, you might have noticed that if you teleport to a place far away from the spawn chunks, that place will have a huge amount of chunk errors. Note that this is in multiplayer, but it might just be a LAN world problem. Also, please don't ask for environment from the other player, as the other player was on the same computer (It was an offline account).
What I expected to happen was...
There would be no chunk errors, or at least they would be very rare.
What actually happened was...
After teleporting away from the spawn chunks, there were tons of chunk errors.
Steps to reproduce:
1. Open a new world.
2. Open to LAN (Or use a server).
3. Teleport out of the spawn chunks (Usually about 13 chunks away from where you spawned)
4. Look around a bit.
5. You should see a large amount of chunk errors.

UPDATE: The chunk errors still occur in the newest snapshots. They do seem to be changing from snapshot to snapshot (15w41b has lots of chunk errors but many were in the same area), but it might just be a random pattern thing.