---- Minecraft Crash Report ----
// Don't be sad, have a hug! <3

Time: 03/02/13 12:21 PM
Description: Ticking memory connection

java.lang.NullPointerException
	at ur.f(SourceFile:129)
	at ur.h(SourceFile:143)
	at qw.a(SourceFile:219)
	at px.c_(SourceFile:189)
	at qx.r(SourceFile:388)
	at qx.c(SourceFile:380)
	at md.j_(EntityLiving.java:807)
	at qx.j_(SourceFile:200)
	at iq.g(SourceFile:175)
	at iv.a(SourceFile:199)
	at eb.a(SourceFile:136)
	at cf.b(SourceFile:55)
	at iv.d(SourceFile:57)
	at iw.b(SourceFile:39)
	at bec.b(SourceFile:84)
	at net.minecraft.server.MinecraftServer.r(SourceFile:762)
	at net.minecraft.server.MinecraftServer.q(SourceFile:679)
	at bdz.q(IntegratedServer.java:170)
	at net.minecraft.server.MinecraftServer.run(SourceFile:613)
	at fy.run(SourceFile:849)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- System Details --
Details:
	Minecraft Version: 1.4.7
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.7.0_05, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 229902872 bytes (219 MB) / 608174080 bytes (580 MB) up to 608174080 bytes (580 MB)
	JVM Flags: 2 total; -Xms600m -Xmx600m
	AABB Pool Size: 303 (16968 bytes; 0 MB) allocated, 193 (10808 bytes; 0 MB) used
	Suspicious classes: IWrUpdater, Config, WrUpdaterSmooth, ...]
	IntCache: cache: 0, tcache: 0, allocated: 3, tallocated: 63
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 29 (1624 bytes; 0 MB) allocated, 22 (1232 bytes; 0 MB) used
	Player Count: 1 / 8; [iq['dvdblueray1'/8439, l='Game Design 1.4.7 only', x=62.25, y=60.00, z=60.69]]
	Type: Integrated Server (map_client.txt)
	Is Modded: Very likely; Jar signature invalidated