[BUG] Floor Glitch Exploit

Hey, my buddy just found out a way to look and loot through floors.

It happens if you have placed 2 furnaces right next to each other and jump in between them.
If you stand up you can not only look through but also loot AND shoot people. Please fix this ASAP!

(Click images for a bigger version)

http://fs1.directupload.net/images/150809/i3tgbion.jpg http://fs1.directupload.net/images/150809/tryr5tx4.jpg http://fs1.directupload.net/images/150809/rmgdrjqx.jpg