From a fresh install with no other mods, I've done the following:
install latest modloader
install latest modloaderMP
install latest MCForge (client)
Delete metaf-inf
With this, minecraft runs fine.
Once I install IC2, It bombs.
The modloader.log is as follows:
Oct 10, 2011 6:17:13 PM ModLoader init
FINE: ModLoader Beta 1.8.1 Initializing...
Oct 10, 2011 6:17:13 PM ModLoader readFromClassPath
FINER: Adding mods from C:\Documents and Settings\emmaboo\Application Data\.minecraft\bin\minecraft.jar
Oct 10, 2011 6:17:13 PM ModLoader readFromClassPath
FINER: Zip found.
Oct 10, 2011 6:17:13 PM ModLoader addMod
FINE: Failed to load mod from "mod_IC2.class"
Oct 10, 2011 6:17:13 PM ModLoader addMod
FINER: THROW
java.lang.IncompatibleClassChangeError: class ic2.BlockMultiID has interface rw as super class
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(Unknown Source)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$000(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(Unknown Source)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$000(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.Class.getDeclaredFields0(Native Method)
at java.lang.Class.privateGetDeclaredFields(Unknown Source)
at java.lang.Class.privateGetPublicFields(Unknown Source)
at java.lang.Class.getFields(Unknown Source)
at ModLoader.setupProperties(ModLoader.java:1583)
at ModLoader.addMod(ModLoader.java:274)
at ModLoader.readFromClassPath(ModLoader.java:1114)
at ModLoader.init(ModLoader.java:825)
at ModLoader.AddAllRenderers(ModLoader.java:186)
at aam.(aam.java:61)
at aam.(aam.java:10)
at net.minecraft.client.Minecraft.a(SourceFile:259)
at net.minecraft.client.Minecraft.run(SourceFile:629)
at java.lang.Thread.run(Unknown Source)
Oct 10, 2011 6:17:23 PM ModLoader AddAllRenderers
FINE: Initialized
I'm pretty sure i've got the latest versions of each prerequisite....
Any suggestions?