Minecraft Wiki:Issues/12w49a

Issues
wither does not spawn
 * Spawns fine for me. You sure you don't have it in Peaceful? --Kahless61 23:24, 7 December 2012 (UTC)

Huge world destroying bug, replaces end terrain with various blocks, including many sheets of water floating in the air.
 * Also not reproducing. A screenshot, seed, anything would be nice. --Kahless61 00:08, 8 December 2012 (UTC)
 * I'm having the same issue - seems to be client-side corruption, as interacting with the world will show the server-side map is still intact --128.113.157.77 04:48, 8 December 2012 (UTC)