Version Client Server Release Information
v4.5 1.9-pre5 1.9-pre5 Updated to support Minecraft Beta 1.9-pre5 and Minecraft Beta Server 1.9-pre5.
Improved Retroguard and Exceptor tools.
v4.4 1.8.1 1.8.1 Updated to support Minecraft Beta 1.8.1 and Minecraft Beta Server 1.8.1.
Improved Retroguard and Exceptor tools.
Fixes to mapping of methods in EntityLiving.
Bugfix for crashes when playing sounds due to issue in Block.java.
v4.3 1.7.3 1.7.3 Updated to support Minecraft Beta 1.7.3 and Minecraft Beta Server 1.7.3.
v4.2 1.7.2 1.7.2 Updated to support Minecraft Beta 1.7.2 and Minecraft Beta Server 1.7.2.
v4.1 1.6.6 1.6.6 Added an Eclipse workspace.
Included a reobfuscation bugfix.
v4.0 1.6.6 1.6.6 Added new tool Exceptor.
Added alternative support for fernflower decompiler.
v3.4 1.6.6 1.6.6 Updated to support Minecraft Beta 1.6.6 and Minecraft Beta Server 1.6.6.
v3.3 1.6.5 1.6.5 Updated to support Minecraft Beta 1.6.5 and Minecraft Beta Server 1.6.5.
v3.2 1.6.4 1.6.4 Updated to support Minecraft Beta 1.6.4 and Minecraft Beta Server 1.6.4.
Added support for external jar files in recompile and reobfuscation.
Updated the readme files.
Small bugfix for using mcp offline.
v3.1 1.5_01 1.5_02 Some more bugfixes in the python scripts.
v3.0 1.4_01 1.4_01 Updated to support Minecraft Beta 1.4_01 and Minecraft Beta Server 1.4_01.
Complete rewrite of the scripts in python.
RetroGuard used both for deof and reobf.
Automatic detection of modified classes during reobfuscation.
Protection on cleanup.bat/sh.
Advanced logging system (logs/mcp.log, logs/mcperr.log).
Removed repackager.exe and mono dependancy on Linux.
Cleaner directory structure.
Out of the box decompilation compatibility with modded jars.
Rolling update model on top of the usual full package distrib.
Custom files in bin directory are preserved during recompilation.
Custom files are automatically copied to reobf directory during reobf.
v2.12 1.5_01 1.5_02 Updated to support Minecraft Beta 1.5_01 and Minecraft Beta Server 1.5_02.
v2.11 1.4_01 1.4_01 Updated to support Minecraft Beta 1.4_01 and Minecraft Beta Server 1.4_01.
v2.10 1.4 1.4 Updated to support Minecraft Beta 1.4 and Minecraft Beta Server 1.4.
v2.9a 1.3_01 1.3 Added support for mod loader 1.3_01v3.
Added MCP Mod System SDK updated for 1.3_01.
Updated name mappings.
v2.9 1.3_01 1.3 Updated to support Minecraft Beta 1.3_01 and Minecraft Beta Server 1.3.
v2.8 1.2_02 1.2_01 Added alpha version of OSX support.
Added alpha version of the MCP mod system.
Updated mapping with a lot more method and field names.
v2.7 1.2_02 1.2_01 Updated to support Minecraft Beta 1.2_02 and Minecraft Beta Server 1.2_01.
v2.6 1.1_02 1.1_02 Updated to support Minecraft Beta 1.1_02 and Minecraft Beta Server 1.1_02.
v2.5 1.2.6 0.2.8 Updated to support Minecraft Alpha 1.2.6 and Minecraft Alpha Server 0.2.8, reobf-fix recommended.
v2.4 1.2.5 0.2.7 Updated to support Minecraft Alpha 1.2.5 and Minecraft Alpha Server 0.2.7.
v2.3 1.2.3_04 0.2.5_02 Updated to support Minecraft Alpha 1.2.3_04 and Minecraft Server Alpha 0.2.5_02.
Linux version is now available.
Renamer now includes the OpenGL constant annotater from MissLil.
Renamer output the proper reobfuscation table for Obfuscathon_v2.
Name collision has been turned off, removing all the _00 tails on many variables.
Obfuscathon is now context aware. This should remove a lot of prb with the reobfuscation.
Various updates on the scripts.
The location of the CSVs have been moved to MCP server. Related tools have been updated.
.Many modifications on the spreadsheets.
Started porting the whole CSV hell to a cleaner database.
v2.2a 1.2.2 0.2.4 Bugfixes for the re-obfuscation tools.
v2.2 1.2.2 0.2.4 Re-obfuscation beta test starting to make mods compatible with original jar files.
v2.1 1.2.2 0.2.4 Updated to support Minecraft Alpha 1.2.2.
v2.0a 1.2.1_01 0.2.3 A minor bugfix. Some scripts did not work properly if there were space in the path.
v2.0 1.2.1_01 0.2.3 First release for post-Halloween Minecraft versions.
v1.6 1.1.2_01 0.2.1 All classes have meaningful names now; the class name mappings and the field name mappings are applied.
v1.5 1.1.2_01 0.2.1 Extend the scripts to also support decompiling, recompiling and testing the minecraft_server.jar file.
v1.4 1.1.2_01 0.2.1 Using a deobfuscator to rename all fields and methods and jadretro to fix some decompile bugs.
v1.3 1.1.2_01 0.2.1 Added upgrade scripts to decompile and recompile Minecraft.class, MinecraftApplet.class and MinecraftServer.class.
v1.2 1.1.2_01 0.2.1 Redirect output of all tools to a logfile.
v1.1 1.1.2_01 0.2.1 Fixed TNT bug.
v1.0 1.1.2_01 0.2.1 First release.


Taken from the minecraft wiki: https://minecraft.gamepedia.com/Programs_and_editors/Mod_Coder_Pack