Java Edition Beta 1.3

Beta 1.3^[1] added redstone repeaters, beds, three types of slabs, a new splash screen as well as other changes and fixes.

Additions

Redstone repeaters
Three new half-size blocks (wooden slab, cobblestone slab, sandstone slab)
- Wooden slab has the properties of stone slab.
New Mojang logo splash screen
Added whitelisting to the server. To use, enter whitelist <cmd> where cmd is on, off, add <player>, remove <player>, list or reload
Graphics settings

Breaking a block made of two slabs now drops 2 slabs.
Slimes have a higher spawn rate
Ability to toggle between classic lighting and "smooth" lighting
Worlds now use a generic McRegion chunk save format, with built-in auto conversion
Beds can now be obtained without inventory editiors
While starting a new world, players can choose the world's name and seed to generate the world from.
More than 5 Worlds possible
Scrollbars added in both the texture pack list, and in the map selection screen
F1 and F3 are now toggled when pressed.
When F3 is toggled on, mobs display their unique entity ID numbers over their heads.
F8 toggles mouse smoothing
In 3rd person mode, character can be visibly seen to bob side to side when you walk (only when View Bobbing is enabled).
Sandstone is now found at the bottom of naturally generated sand.
All pressure plates now require two of its materials, instead of 3. Stone slabs are now created by using 3 of the materials
Mine time for sandstone decreased.
Redstone dust will get darker the farther away it is from a source of power.
Fewer passive Mobs when on harder modes.
Deleting world confirmation changed slightly.
Sulphur renamed back to Gunpowder

When breaking double slabs (one slab placed on another) it will drop two slabs instead of one.
Wood and logs don't burn forever anymore.
Grassland/Sand-related biome border fixed (Boundaries line up, rather than obviously show chunk borders)
No longer receiving Java Log error .txt file spam in the minecraft.exe folder when closing the Minecraft client program.
Players can no longer use the click-release to quickly mine blocks (referred to as "click mining"). (Multiplayer only)
Players no longer glitch when standing on fences in multiplayer.
Players can no longer milk squids.
When right-clicking on a wooden door while holding a bow or fishing rod, arrows will no longer be fired into the door, nor will the fishing hook be cast into the door.
Hostile mobs can now be attacked properly in multiplayer.
Lapis lazuli ore now drops 4-8 Lapis Lazuli Dyes in multiplayer.
Bedrock and other blocks cannot be removed by tilling grass or dirt with a hoe and placing seeds anymore.

There is a debug version of Beta 1.3 that spawns the with 64 torches, 64 beds, a diamond pickaxe, a diamond shovel, and a diamond axe upon creating a new world.