I loaded up a MC world in 14w30c to check the new optimizations in speed and such. I loaded a default world in creative mode. I was flying around and messing with the video settings to see what were the best settings for best performance. I noticed a villlage but it was weird; a row of chunks wasn't loading and it had only a few blocks that repeated through every chunk. See image below:
MC-63535
Kind of a chunk error
Resolved
Duplicate
0
António Ramos
(Unassigned)
Unconfirmed
Minecraft 14w30c
Retrieved
I had that problem when i detonated tnt a few snapshots ago. Try doing f3 and A together. It may help 🙂