I feel like these are uncommon/rare, and am selling them. If they are normal or a bug, feel free to correct me. Price is negotiable.
I went into the 1.7.9 client. The heads regained their tooltip, but when they were placed remained Steve. (cadgamer202's head)
What causes the client to rename the tooltip to the defaul "Head"? I can understand the client turning to Steve, since it's the default skin and it needs to pull custom player skins from the database in order to display properly, but the name of the item is purely server based, isn't it?