Bukkit

What steps will reproduce the problem?
1. Have multiple worlds where horses are available with separate inventories
2. Store items in a purchased donkey in one world, then switch to another
3. Summon the donkey, the items from the other world are accessible

What is the expected output? What do you see instead?
Expected the storage would be per-world, but it all is the same storage.

What version of the product are you using?
1.1.7

Do you have an error log of what happened?
Nopw

Please provide any additional information below.