- Official Post
 
We've got a new intermediate build for internal testing.
The most important changes are:
- SMP support, some items/TEs might still have bugs or suffer from kick issues (jetpack, quantum suit etc.)
 - Support for MC 1.8.1
 - New Audio API without using AudioMod, not all sounds are included yet and most are still wip
 - Sounds are included in the main package
 - New cable bounding boxes and interaction raytracing
 - New explosion code which is more block resistance aware, affects nukes, reactors, ITNTs, mining lasers and machine explosions
 - A single .minecraft/mods compatible package for drag & drop install similar to BuildCraft
 - Fiber cable receipe output reduced to 6
 - Tin cable loss increased to 0.025
 - Support indirect redstone on IC2 blocks
 - Scrapboxes can be opened by dispensers
 - SU batteries can charge items in the quickbar
 - The mass fabricator stops with redstone input
 - Personal chests are always unlocked in SP
 - Receipes for small iron dust, nuke and dynamite-o-mote
 - Improved unloaded chunk handling in the EnergyNet code
 - Configuration options for the nuke and reactor explosion power and for disabling IC2 sounds
 - Bugfixes
 
Client downloads (install in the order mentioned):
- ModLoader -> minecraft.jar: http://www.minecraftforum.net/topic/75440-v1…ything-updated/
 - ModLoader MP -> minecraft.jar: http://www.minecraftforum.net/topic/182918-1…tils-teams/#MLM
 - ModLoader MP fix -> minecraft.jar: http://player.to/ic2_20110925_v112/modloadermp-client_fix.7z
 - Minecraft Forge -> minecraft.jar: http://www.minecraftforum.net/topic/514000-api-minecraft-forge/
 - IndustrialCraft 2 -> mods folder: http://player.to/ic2_20111003_v…client_1.15.jar
 
Server downloads (install in the order mentioned):
- ModLoader MP -> minecraft_server.jar: http://www.minecraftforum.net/topic/182918-1…tils-teams/#MLM
 - ModLoader MP fix -> minecraft_server.jar: http://player.to/ic2_20110925_v112/modloadermp-server_fix.7z
 - Minecraft Forge -> minecraft_server.jar: http://www.minecraftforum.net/topic/514000-api-minecraft-forge/
 - IndustrialCraft 2 -> mods folder: http://player.to/ic2_20111003_v…server_1.15.jar
 
Addon developer downloads (not required for users)
I recommend using a fresh minecraft.jar without any IC content and without AudioMod. Do not put IC in minecraft.jar, just copy the package into .minecraft/mods.
You'll have to create the mods folder if it doesn't exist
If minecraft crashes with java.lang.OutOfMemoryError, make sure that the amount of memory you assigned to minecraft + 200 MB doesn't exceed the amount of spare memory before starting it. E.g. if you have 1500 MB free memory, allocate not more than 1300 MB to minecraft (-Xmx1300M -Xms512M). Virtual memory doesn't count.
Another possible fix is to upgrade the sound system, just replace the existing files within minecraft.jar with the contents of http://player.to/ic2_20111003_v115/soundsystem_update.zip.