Me pone esto:
Minecraft has crashed!
---------------------- Minecraft has stopped running because it encountered a problem.
If you wish to report this, please copy this entire text and email it to support@mojang.com.
Please include a description of what you did when the error occured.
--- BEGIN ERROR REPORT a1dce528 --------
Generated 5/11/10 06:44 PM
Minecraft: Minecraft Alpha v1.2.1_01
OS: Windows XP (x86) version 5.1
Java: 1.6.0_22, Sun Microsystems Inc.
VM: Java HotSpot(TM) Client VM (mixed mode, sharing), Sun Microsystems Inc.
LWJGL: 2.4.2
OpenGL: RADEON X700 SE version 2.1.8544 Release, ATI Technologies Inc.
java.lang.NullPointerException
at pt.a(SourceFile:69)
at gi.a(SourceFile:68)
at nu.c(SourceFile:40)
at bn.a(SourceFile:66)
at bn.e(SourceFile:115)
at bn.d(SourceFile:103)
at net.minecraft.client.Minecraft.i(SourceFile:1007)
at net.minecraft.client.Minecraft.run(SourceFile:596)
at java.lang.Thread.run(Unknown Source)
--- END ERROR REPORT 3a6c848a ----------
Cuando intento cambiar el sonido en el minecraft.
