Date and time: 03-22-2014 00:20 (GMT-3)
Bug description: Some objects that should be inside houses (like the mysterious trapdoor on [-2,1] or a chest inside a house around [3,-1]) sometimes don't appear inside the houses. Instead, they are shown from outside and you can't interact with them.
Reproducibility process: Log in on the account in some place far away from the object. Then go there walking. You'll see the object as you can see on the screenshot provided. If you logout and in again, the object renders correctly inside the house.