Windows 8, Java v7 update 51
Upon dying in the most recent snapshots, item frames become "ghostlike" entities and can no longer be interacted with by the player who had recently died.
Both breaking and rotating items in item frames become impossible.
I have demonstrated the effects in the attached image.
Additionally, here is a link to the image (as hosted by gfycat):
MC-2713 Occasionally you can't hit entities with anything