Java Edition 1.5.1 (pre-release)

1.5.1-pre is the pre-release for 1.5.1.

Changes

 * Improved performance

Fixes
10 bugs fixed

From released versions before 1.5.1
 * – Massive ping issues since 1.3.2
 * – Trapdoors and pressure plates (and maybe more) cause lighting problems
 * – FPS Drop due to Smooth Lighting
 * – After changing texture packs thrown Ender Pearls & Splash potions become other items
 * – The text of things fall out of the picture
 * – Invalid potion effects crash the game.
 * – Crash with invalid wool values
 * – Dispenser/Right click incorrectly puts on armor

From the 1.5 snapshots
 * – OSX: Crash on startup (OpenGL "Function is not supported")
 * – Hopper beneath furnace doesn't remove empty buckets

Reupload
The 1.5.1 pre-release was reuploaded on March 20, 2013 to fix a null pointer crash. This reupload then proceeded to be the true release of 1.5.1.