Alpha v1.0.1^[1] was the third of the Seecret Updates, released on July 2, 2010.^[2] It is the first version truly named Alpha as Alpha v1.0.0 was only called "Alpha" retroactively upon the release of v1.0.1.

Additions

Blocks

Iron Door

Lever

Redstone dust

• At the time, redstone dust was not given a name.

Redstone Ore

Redstone Torch

Stone Button

Wood Pressure Plate

Stone Pressure Plate

Changes

Blocks

Cobblestone stairs

• Inventory model is now 3D:

Oak door

• Item texture changed from

Mushrooms

• Generate anywhere.^[verify]
• If generated in sunlight will eventually drop.
  • Do not drop at night time.

Oak stairs

• Inventory model is now 3D:

Signs

• Can now be placed on the sides of blocks.
• Smaller and non-solid.

Spawners

• Does not drop as an item upon being mined.

Burning furnace

• Now drops a regular furnace when mined instead of a burning furnace.

Mobs

General

• Improved mob AI.^{[needs testing]}

World generation

Caves

• Can be much bigger than before.^[verify]

Coal ore

• Blobs now vary in size.^[verify]

Removals

Blocks

Gears

• Removed and replaced by the newly added redstone.
  • This means that gears placed on worlds will turn into redstone or pop off, depending on how they were placed.

General

Distance effects

• Due to their removal, gears no longer appear very stretched at far distances.

Gallery

• 
  A player finding redstone.
• 
  A chair that was built in this version.
• 
  Crafting a wooden pressure plate.
• 
  Crafting cobblestone stairs.
• 
  Redstone in action.
• 
  The inventory.
• 
  Crafting a redstone torch.
• 
  Water flow.
• 
  A button used to open a door.
• 
  The webpage with this version.
• 
  2 doors and a view.
• 
  A spectacle of world gen.

References