The chunks in the nether were not loaded properly. This was done on a server. I loaded the world on the newest snapshot and everything was messed up, but when I restarted the server on 1.4.5, the blocks were normal. I also tried destroying some of the blocks, but they didn't drop anything.
MC-4295
Broken nether loading in 12w49a
Resolved
Duplicate
0
Pulla Mosso
(Unassigned)
Unconfirmed
Snapshot 12w49a
Retrieved
Duplicate of MC-4200 , please use the search function to see if your bug has already been submitted. Currently over 30% of tickets are being closed as duplicate.