[1.3.2] SHA1 digest error for "MinecraftApplet.class"

[Lordmau5]

Exception in thread "Thread-3" java.lang.SecurityException: SHA1 digest error fo
r net/minecraft/client/MinecraftApplet.class
        at sun.security.util.ManifestEntryVerifier.verify(Unknown Source)
        at java.util.jar.JarVerifier.processEntry(Unknown Source)
        at java.util.jar.JarVerifier.update(Unknown Source)
        at java.util.jar.JarVerifier$VerifierStream.read(Unknown Source)
        at sun.misc.Resource.getBytes(Unknown Source)
        at java.net.URLClassLoader.defineClass(Unknown Source)
        at java.net.URLClassLoader.access$100(Unknown Source)
        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)
        at net.minecraft.GameUpdater.createApplet(GameUpdater.java:284)
        at net.minecraft.Launcher$1.run(Launcher.java:94)

 

Minecraft doesn't even start

[LexManos]

Why don't you follow the install instructions and delete meta-inf? Like every other mod...