(Alpha 1.2.8), they would add the "Sneak" key and fix boat crashes. Three months later (Beta 1.0), they would add redstone repeaters, the crafting table UI overhaul, and server.properties.
In internet folklore and horror stories, Alpha 1.2.7 is often described as a "lost" or "corrupted" version of the game. According to these legends: minecraft 1.2.7 alpha