Java Edition Alpha v1.2.3 01

Alpha v1.2.3_01 is a version of Alpha released on November 24, 2010, to fix bugs.
This version was reuploaded twice.
== Fixes ==
; 2 bugs fixed
* Fixed a bug in singleplayer mode where the game would crash when trying to load a newer version, but when the player was in the overworld.
* Fixed infinite looping by disabling leaf decay.
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zh:Java版Alpha v1.2.3 01