Bukkit

What steps will reproduce the problem?
1.Create a chest
2.Put an item in the chest
3.Save the dungeon
4.Load the dungeon

What is the expected output? What do you see instead?

The item which was in the chest is duplicated : it is now in the chest AND in front of it
It doesnt appear for all chests

What version of the product are you using?

This behavior have appeared since the 1.2 update.
I use bukkit 2036 dev build and dungeon builder 0.9.5

Do you have an error log of what happened?

Please provide any additional information below.