Crashes when loading new chunks 14w05b

My world keeps crashing every time I try to load a chunk.
On other versions, it works fine, but 14w05b does not load properly...
Help?

Here is the Crash Report:

---- Minecraft Crash Report ----
// I bet Cylons wouldn't have this problem.

Time: 2/1/14 7:09 AM
Description: Ticking memory connection

java.lang.IllegalArgumentException: n must be positive
	at java.util.Random.nextInt(Unknown Source)
	at air.a(SourceFile:131)
	at air.a(SourceFile:27)
	at ail.a(SourceFile:394)
	at aiw.a(SourceFile:138)
	at asj.a(SourceFile:443)
	at nq.a(SourceFile:175)
	at arg.a(SourceFile:854)
	at nq.c(SourceFile:104)
	at np.<init>(SourceFile:36)
	at no.a(SourceFile:228)
	at no.a(SourceFile:265)
	at ml.a(SourceFile:166)
	at ml.c(SourceFile:218)
	at ml.a(SourceFile:107)
	at ol.c(SourceFile:87)
	at ol.a(SourceFile:52)
	at fe.a(SourceFile:174)
	at oa.c(SourceFile:134)
	at net.minecraft.server.MinecraftServer.v(SourceFile:545)
	at net.minecraft.server.MinecraftServer.u(SourceFile:461)
	at cae.u(SourceFile:123)
	at net.minecraft.server.MinecraftServer.run(SourceFile:377)
	at mh.run(SourceFile:647)


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

-- Head --
Stacktrace:
	at java.util.Random.nextInt(Unknown Source)
	at air.a(SourceFile:131)
	at air.a(SourceFile:27)
	at ail.a(SourceFile:394)
	at aiw.a(SourceFile:138)
	at asj.a(SourceFile:443)
	at nq.a(SourceFile:175)
	at arg.a(SourceFile:854)
	at nq.c(SourceFile:104)
	at np.<init>(SourceFile:36)
	at no.a(SourceFile:228)
	at no.a(SourceFile:265)
	at ml.a(SourceFile:166)
	at ml.c(SourceFile:218)
	at ml.a(SourceFile:107)
	at ol.c(SourceFile:87)
	at ol.a(SourceFile:52)
	at fe.a(SourceFile:174)

-- Ticking connection --
Details:
	Connection: fe@4fa0b8
Stacktrace:
	at oa.c(SourceFile:134)
	at net.minecraft.server.MinecraftServer.v(SourceFile:545)
	at net.minecraft.server.MinecraftServer.u(SourceFile:461)
	at cae.u(SourceFile:123)
	at net.minecraft.server.MinecraftServer.run(SourceFile:377)
	at mh.run(SourceFile:647)

-- System Details --
Details:
	Minecraft Version: 14w05b
	Operating System: Windows 8 (x86) version 6.2
	Java Version: 1.7.0_45, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Oracle Corporation
	Memory: 12233104 bytes (11 MB) / 80539648 bytes (76 MB) up to 518979584 bytes (494 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M
	IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
	Profiler Position: N/A (disabled)
	Player Count: 1 / 8; [nu['ilcj'/4, l='Server Spawn', x=0.50, y=320.00, z=320.50]]
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.