Recorded by MinecraftError:
MCPatcherUtils initialized. Directory C:\Users\george\AppData\Roaming\.minecraft
Exception in thread "Thread-5" java.lang.NoClassDefFoundError: de/matthiasmann/twl/Widget
	at lr.<init>(Block.java:49)
	at lr.<init>(Block.java:79)
	at co.<init>(SourceFile:9)
	at lr.<clinit>(Block.java:880)
	at mk.<init>(SourceFile:14)
	at net.minecraft.client.Minecraft.<init>(SourceFile:172)
	at l.<init>(SourceFile:34)
	at net.minecraft.client.MinecraftApplet.init(SourceFile:34)
	at net.minecraft.Launcher.replace(Launcher.java:143)
	at net.minecraft.Launcher$1.run(Launcher.java:87)
Caused by: java.lang.ClassNotFoundException: de.matthiasmann.twl.Widget
	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 java.lang.ClassLoader.loadClass(Unknown Source)
	... 10 more