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Backup all files in stats folder, and just delete all from that folder. Works for me!

Info:

Minecraft: Minecraft 1.1
OS: Windows XP (x86) version 5.1
Java: 1.7.0_02, Oracle Corporation
VM: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
LWJGL: 2.4.2
OpenGL: GeForce 8600 GT/PCI/SSE2/3DNOW! version 3.3.0, NVIDIA Corporation

I have a problem with instalation new Mods. I installed ModLoader 1.1 and ModLoaderMp 1.1, and all you have done and still throws an error!

Problem with TooManyItems 1.1, Mod Extruder 1.2, MoreExplosivesMod, ...

java.util.UnknownFormatConversionException: Conversion = 'K'
	at java.util.Formatter$FormatSpecifier.conversion(Unknown Source)
	at java.util.Formatter$FormatSpecifier.<init>(Unknown Source)
	at java.util.Formatter.parse(Unknown Source)
	at java.util.Formatter.format(Unknown Source)
	at java.util.Formatter.format(Unknown Source)
	at java.lang.String.format(Unknown Source)
	at abn.a(SourceFile:142)
	at ModLoader.initStats(ModLoader.java:956)
	at ModLoader.init(ModLoader.java:843)
	at ModLoader.AddAllRenderers(ModLoader.java:189)
	at afq.<init>(afq.java:80)
	at afq.<clinit>(afq.java:9)
	at net.minecraft.client.Minecraft.a(SourceFile:265)
	at net.minecraft.client.Minecraft.run(SourceFile:648)
	at java.lang.Thread.run(Unknown Source)

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