Crash (Batching chunks java.lang.ArrayIndexOutOfBoundsException)

This snapshot has alot of crashes

— Minecraft Crash Report ----
// Sorry

Time: 7/23/14 2:29 PM
Description: Batching chunks

java.lang.ArrayIndexOutOfBoundsException: 4668
at chc.a(SourceFile:80)
at cmt.a(SourceFile:225)
at cmt.b(SourceFile:164)
at cmm.a(SourceFile:71)
at cmm.run(SourceFile:31)
at java.lang.Thread.run(Unknown Source)

A detailed walkthrough of the error, its code path and all known details is as follows:
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– System Details –
Details:
Minecraft Version: 14w30b
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.7.0_51, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 1269437560 bytes (1210 MB) / 1838153728 bytes (1753 MB) up to 1908932608 bytes (1820 MB)
JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx2G
IntCache: cache: 0, tcache: 0, allocated: 12, tallocated: 94