Resolution: Works As Intended
Affects Version/s: Minecraft 1.4.2, Minecraft 1.4.4
Fix Version/s: None
Environment:Windows 7 64bit Ultimate
Unsure which Java build - but should be Java 7.
Tested on Vanilla SMP 1.4.2 Survival Server and on 1.4.4Pre Client (Creative)
Client has MCPatcher installed for basic HD textures.
Item Frames appear to not take up any kind of location - might be the solution to a number of related bugs. Namely, you can put multiple item frames in a single space (not just on top of each other, as was reported in a different bug). They also appear to be place-able alongside torches, paintings, ladders, and even regular blocks.
What I expected: You could have one item frame per air block, just like torches, ladders, vines, etc - things that are placed on the sides of blocks.
What actually happened: You can place multiple item frames in a single space alongside a single torch, ladder, painting/etc, using the same method without disturbing the frames.
Screenshot Details: Shows the overlapping of frames in a single space, with a torch overlapped on the side. Tested also that torch could be places in the nook, as well as ladders and redstone torches, etc.
Steps to reproduce: Build a small enclosure such as in the screenshot - 3x3x3 with a channel in the middle, so there are 3 blocks facing one another. Simply place one frame on each face, then put items into a frame. Then you can place a torch, ladder, or other item over it by aiming on the corners of the block face containing an item frame.