Hopper: java.lang.NoClassDefFoundError: org/lwjgl/MemoryUtil

java.lang.NoClassDefFoundError: org/lwjgl/MemoryUtil
	at org.lwjgl.opengl.WindowsDisplay.setTitle(WindowsDisplay.java:493)
	at org.lwjgl.opengl.Display.setTitle(Display.java:541)
	at org.lwjgl.opengl.Display.createWindow(Display.java:312)
	at org.lwjgl.opengl.Display.create(Display.java:848)
	at org.lwjgl.opengl.Display.create(Display.java:757)
	at azd.Z(SourceFile:354)

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

Time: 26/11/13 17:55
Description: Initializing game

java.lang.NoClassDefFoundError: org/lwjgl/MemoryUtil
	at org.lwjgl.opengl.WindowsDisplay.setTitle(WindowsDisplay.java:493)
	at org.lwjgl.opengl.Display.setTitle(Display.java:541)
	at org.lwjgl.opengl.Display.createWindow(Display.java:312)
	at org.lwjgl.opengl.Display.create(Display.java:848)
	at org.lwjgl.opengl.Display.create(Display.java:757)
	at azd.Z(SourceFile:354)
	at azd.e(SourceFile:689)
	at net.minecraft.client.main.Main.main(SourceFile:103)
Caused by: java.lang.ClassNotFoundException: org.lwjgl.MemoryUtil
	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)
	... 8 more


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

-- Head --
Stacktrace:
	at org.lwjgl.opengl.WindowsDisplay.setTitle(WindowsDisplay.java:493)
	at org.lwjgl.opengl.Display.setTitle(Display.java:541)
	at org.lwjgl.opengl.Display.createWindow(Display.java:312)
	at org.lwjgl.opengl.Display.create(Display.java:848)
	at org.lwjgl.opengl.Display.create(Display.java:757)
	at azd.Z(SourceFile:354)

-- Initialization --
Details:
Stacktrace:
	at azd.e(SourceFile:689)
	at net.minecraft.client.main.Main.main(SourceFile:103)

-- System Details --
Details:
	Minecraft Version: 1.7.2
	Operating System: Windows 8 (x86) version 6.2
	Java Version: 1.7.0_25, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Oracle Corporation
	Memory: 2883520 bytes (2 MB) / 26808320 bytes (25 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: ~~ERROR~~ NoClassDefFoundError: org/lwjgl/opengl/GL11
	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Resource Packs: []
	Current Language: ~~ERROR~~ NullPointerException: null
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: ~~ERROR~~ NullPointerException: null
	Anisotropic Filtering: Off (1)