I had it happen in 1.0.5. I was eagerly awaiting the update because of problems with this.
I went through the Nether to travel to a distant part of the overworld with another player in a realm, then came back. Upon returning to my base, all nearby peaceful mobs had despawned. This included sheep that I had bred, penned, and dyed with each available color, cows I had bred and penned, dogs that were parked, and a corralled, tame horse.
I'm not sure if it is the same bug, but I also had a cat despawn within a few seconds of my taming it.
If anything, the bug seems worse. I'd lost some chickens before, but in this case I lost every single domesticated animal in my base.
I set up an enderman farm in the end, near Y=0 and about 200 blocks from the main island. I have yet to see an enderman spawn on the pad, but I've got plenty of creepers, zombies, and spiders.
This is not fixed. Please re-open.
I had it happen in 1.0.5. I was eagerly awaiting the update because of problems with this.
I went through the Nether to travel to a distant part of the overworld with another player in a realm, then came back. Upon returning to my base, all nearby peaceful mobs had despawned. This included sheep that I had bred, penned, and dyed with each available color, cows I had bred and penned, dogs that were parked, and a corralled, tame horse.
I'm not sure if it is the same bug, but I also had a cat despawn within a few seconds of my taming it.
If anything, the bug seems worse. I'd lost some chickens before, but in this case I lost every single domesticated animal in my base.