Java Edition 1.5 (pre-release)

1.5-pre is the pre-release for 1.5.

Fixes
29 bugs fixed

From released versions before 1.5.1
 * – Spider Jockey: Spider moves, but Skeleton not
 * – Piston extension remains after piston is destroyed
 * – Fence gate closes when destroying adjacent block
 * – Breaking a Dragon Egg in Survival with a high Haste effect crashes the game
 * – Fence Glitch
 * – Trying to walk from a block with a collision box shorter than 1 block to another block that is also shorter, causes you to momentarily glitch into the ground
 * – Flaming arrows with PvP off still set players on fire
 * – Map not updating
 * – Items Droped on fences jump around
 * – anvils dont do enough damage
 * – Items in equipment slot / Crashes if CanPickUpLoot is set to 1 in level.dat/player.dat files
 * – Command Block Gamerule Update Problem
 * – Upon creating the wither, It leaves ghost blocks
 * – Undespawning entities at long range or Unloaded spawners still spawn.
 * – /clear Not functioning as expected
 * – Compatibility issue with Windows 8 upgrades and Minecraft
 * – Game crashes when I click "singleplayer" in the main menu
 * – Multiplayer, slow chunk loading and or read timeout kick

From the 1.5.1 snapshots
 * – Blocks being constantly pushed by pistons turn invisible after some time
 * – Redstone dust apperance stays powered or unpowered when its powered state is toggled fast
 * – Comparators do not update their output signal
 * – Powered mechanisms (except for Dispensers and Droppers) react when they should not
 * – Crash when giving item 31 with damage 3
 * – Incorrect death messages in non-english languages
 * – DisplayTile, DisplayData, DisplayOffset are not saved with MinecartSpawners
 * – Mob Spawners Cannot Store Movement Data for Mobs
 * – Minecart Glitches Through Block
 * – Pistons fire more than once per tick / block teleporting
 * – the [esc] key doesn't work when you're in the command block menu and when placing signs