1.2.3 ArrayIndexOutOfBoundsException

Reproducing ArrayIndexOutOfBoundsException: -8 with vanilla Minecraft and 1000 MB heap,
see http://www.minecraftwiki.net/wiki/Known_bugs/Version_1.2.3#Crashing.2FSystem .
java -Xmx1000M -Xms1000M -cp minecraft.jar net.minecraft.LauncherFrame
27 achievements
177 recipes
Setting user: anonymy, 1234567890123456789
Loading: net.java.games.input.DirectAndRawInputEnvironmentPlugin

Starting up SoundSystem...
Initializing LWJGL OpenAL
    (The LWJGL binding of OpenAL.  For more information, see http://www.lwjgl.org)
OpenAL initialized.

Scanning folders...
Total conversion count is 6
 366970320
root 152205880
 170708600
 382466680
root 156525520
 175353960
java.lang.ArrayIndexOutOfBoundsException: -8
	at acf.h(SourceFile:275)
	at acf.a(SourceFile:390)
	at wz.b(SourceFile:371)
	at wz.d(SourceFile:461)
	at oq.n_(SourceFile:129)
	at wz.n(SourceFile:1273)
	at net.minecraft.client.Minecraft.k(SourceFile:1612)
	at net.minecraft.client.Minecraft.x(SourceFile:724)
	at net.minecraft.client.Minecraft.run(SourceFile:664)
	at java.lang.Thread.run(Unknown Source)
Stopping!

SoundSystem shutting down...
    Author: Paul Lamb, www.paulscode.com