I cannot confirm if this issue still persists in 14w04b. However, I have a world that seems to have the same issue in 1.7.4. I will have to upload this, which can take some time. I will keep you posted about the world download.
Aaron, I believe we tried that, but with no luck. Although, it's a while ago, so I'm not really sure about that.
Thank you, Mike. That should help in some way.
Doesn't really matter if it's singleplayer, since SP is basically a "server" running anyways.
I should've uploaded the world files back when I originally posted about this back in December. As of right now, I don't have it, but I'm gonna ask some of the server folks to see if anyone still has a copy of the world.
EDIT: We have not had this issue since that time though, if we do get it in the end, I will make sure to upload a world file with the approximate coordinates of the issue.
Tails, the funny part of this though, is that we deleted and reloaded the chunk using MCEdit, and the problem still persisted. Wouldn't reloading the chunk help towards corrupted chunks?
Gerrard, I changed the title for you. Is that how you wanted it to explain?
To add to this, after further investigation, it seems to only happen with sheep. The 5000 entities are actually 5000 sheep. How this happened, is this unknown.
It's running the normal minecraft server version that you can get from Minecraft.net, if that's what you mean.
I have uploaded the world download here: Link removed (broken)
It's around 600 mb. I'm not entirely sure of the location where the spawn happened, but it shouldn't be more than around 500 blocks from spawn (give or take).