When I was changing from the default Recource pack to Ozocraft Recourcepack.

This is the error log:

---- Minecraft Crash Report ----
// Who set us up the TNT?

Time: 6/14/13 7:32 PM
Description: Rendering screen

java.lang.NullPointerException
	at java.nio.DirectIntBufferU.put(Unknown Source)
	at bhs.a(SourceFile:152)
	at bhs.a(SourceFile:67)
	at bho.b(SourceFile:107)
	at bho.a(SourceFile:56)
	at bhq.a(SourceFile:45)
	at bhq.a(SourceFile:90)
	at bja.b(SourceFile:66)
	at bja.a(SourceFile:54)
	at atl.a(SourceFile:397)
	at bjd.a(SourceFile:162)
	at avv.a(SourceFile:173)
	at bjc.a(SourceFile:110)
	at bei.b(SourceFile:712)
	at atl.S(SourceFile:673)
	at atl.d(SourceFile:606)
	at net.minecraft.client.main.Main.main(SourceFile:85)


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

-- Head --
Stacktrace:
	at java.nio.DirectIntBufferU.put(Unknown Source)
	at bhs.a(SourceFile:152)
	at bhs.a(SourceFile:67)
	at bho.b(SourceFile:107)
	at bho.a(SourceFile:56)
	at bhq.a(SourceFile:45)
	at bhq.a(SourceFile:90)
	at bja.b(SourceFile:66)
	at bja.a(SourceFile:54)
	at atl.a(SourceFile:397)
	at bjd.a(SourceFile:162)
	at avv.a(SourceFile:173)
	at bjc.a(SourceFile:110)

-- Screen render details --
Details:
	Screen name: bjc
	Mouse location: Scaled: (153, 125). Absolute: (306, 228)
	Screen size: Scaled: (427, 240). Absolute: (854, 480). Scale factor of 2
Stacktrace:
	at bei.b(SourceFile:712)
	at atl.S(SourceFile:673)
	at atl.d(SourceFile:606)
	at net.minecraft.client.main.Main.main(SourceFile:85)

-- System Details --
Details:
	Minecraft Version: 13w24b
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.7.0_21, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 25718104 bytes (24 MB) / 214564864 bytes (204 MB) up to 954466304 bytes (910 MB)
	JVM Flags: 1 total; -Xmx1G
	AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
	Suspicious classes: No suspicious classes found.
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	Launched Version: 13w24b
	LWJGL: 2.9.0
	OpenGL: Intel(R) HD Graphics Family GL version 3.0.0 - Build 8.15.10.2353, Intel
	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Texture Pack: Default
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: ~~ERROR~~ NullPointerException: null