Hopper: java.lang.NoClassDefFoundError: javax/vecmath/Matrix4f

This is an automatically generated report based from the following crash: http://hopper.minecraft.net/crashes/minecraft/MCX-465201/

Crash:

java.lang.NoClassDefFoundError: javax/vecmath/Matrix4f
	at bpb.c(SourceFile:245)
	at bpb.<init>(SourceFile:45)
	at bll.c(SourceFile:163)
	at bbt.a(SourceFile:93)
	at bcd.a(SourceFile:172)
	at bcd.d(SourceFile:236)
	at bcd.k(SourceFile:211)

The following is the first clean report made public about this crash:

---- Minecraft Crash Report ----
// I feel sad now :(

Time: 25/10/13 11:13
Description: Updating screen events

java.lang.NoClassDefFoundError: javax/vecmath/Matrix4f
	at bpb.c(SourceFile:245)
	at bpb.<init>(SourceFile:45)
	at bll.c(SourceFile:163)
	at bbt.a(SourceFile:93)
	at bcd.a(SourceFile:172)
	at bcd.d(SourceFile:236)
	at bcd.k(SourceFile:211)
	at azd.o(SourceFile:1303)
	at azd.ad(SourceFile:753)
	at azd.e(SourceFile:704)
	at net.minecraft.client.main.Main.main(SourceFile:103)
Caused by: java.lang.ClassNotFoundException: javax.vecmath.Matrix4f
	at java.net.URLClassLoader$1.run(Unknown Source)
	at java.net.URLClassLoader$1.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(Unknown Source)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	... 11 more


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

-- Head --
Stacktrace:
	at bpb.c(SourceFile:245)
	at bpb.<init>(SourceFile:45)
	at bll.c(SourceFile:163)
	at bbt.a(SourceFile:93)
	at bcd.a(SourceFile:172)
	at bcd.d(SourceFile:236)
	at bcd.k(SourceFile:211)

-- Affected screen --
Details:
	Screen name: bbt
Stacktrace:
	at azd.o(SourceFile:1303)
	at azd.ad(SourceFile:753)
	at azd.e(SourceFile:704)
	at net.minecraft.client.main.Main.main(SourceFile:103)

-- System Details --
Details:
	Minecraft Version: 1.7.2
	Operating System: Windows 7 (x86) version 6.1
	Java Version: 1.7.0_25, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Oracle Corporation
	Memory: 17103624 bytes (16 MB) / 75210752 bytes (71 MB) up to 518979584 bytes (494 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M
	AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	Launched Version: 1.7.2
	LWJGL: 2.9.0
	OpenGL: ION/PCI/SSE2 GL version 3.0.0, NVIDIA Corporation
	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Resource Packs: [JohnSmithLegacy_2.zip]
	Current Language: Português (BR)
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: ~~ERROR~~ NullPointerException: null
	Anisotropic Filtering: Off (1)

You can see this full report at http://hopper.minecraft.net/crashes/minecraft/MCX-465201/21337581/