Item Frame

The item frame is an upcoming item similar to a display case. It will show the item or block that is in it. The item displayed can be rotated by right-clicking the frame. Maps will show their contents and compasses and clocks will work as normal. When broken, the frame drops both itself and the item it contains. Because item frame are technically entities, they can be broken in Adventure Mode.

Bugs

 * Pick-Block-Key gives the item in the frame, as opposed to the frame itself. (May be intentional.)
 * Torches can be placed on item frames, but only indirectly.
 * Firing a projectile (snowball, egg, arrow, etc.) at an Item Frame will cause the Item Frame to break off of the wall.
 * Standing approximately 22 blocks away from a placed Item Frame will make it disappear as if it is not there. Walking toward it will make it reappear, and it seems that having an item in the Item Frame will not affect this bug.
 * The frame will also disappear just before it leaves the edge of your field of view.
 * Placing an item in a frame while it is in a stack will cause you to lose your stack of items, breaking the frame will only give you 1 item in return.
 * If the block it is placed on is moved by a piston, the frame will not move. However the frame will break upon walking into it.

Trivia

 * The item frame is based off a suggestion on Reddit, like the Ender chest and flower pot.
 * A map put into an item frame will show markers at any other item frames with maps in them. This is a good way to mark certain areas.
 * Items appear flat in the frame while blocks protrude from it.
 * Item frames are a handy way to clone enchanted weaponry or tools for Creative mode.
 * Item frames can be placed on cactus blocks, fences, slabs and cobblestone walls.
 * Item frames are entities, so they act like paintings.