---- Minecraft Crash Report ---- // Quite honestly, I wouldn't worry myself about that. Time: 3/9/13 10:02 PM Description: Failed to start game java.lang.SecurityException: SHA1 digest error for bek.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.client.Minecraft.a(SourceFile:241) at asq.a(SourceFile:56) at net.minecraft.client.Minecraft.run(SourceFile:515) at java.lang.Thread.run(Unknown Source) A detailed walkthrough of the error, its code path and all known details is as follows: --------------------------------------------------------------------------------------- -- System Details -- Details: Minecraft Version: 1.4.7 Operating System: Windows 7 (x86) version 6.1 Java Version: 1.7.0_17, Oracle Corporation Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation Memory: 401127856 bytes (382 MB) / 518979584 bytes (494 MB) up to 1037959168 bytes (989 MB) JVM Flags: 2 total; -Xms512m -Xmx1024m 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 LWJGL: 2.4.2 OpenGL: Intel(R) HD Graphics GL version 2.1.0 - Build 8.15.10.2202, Intel Is Modded: Probably not. Jar signature remains and client brand is untouched. Type: Client (map_client.txt) Texture Pack: MCWAR.zip Profiler Position: N/A (disabled) Vec3 Pool Size: ~~ERROR~~ NullPointerException: null