Today I downloaded the latest version of Minecraft Forge and did all the stuff needed to make it work, and when it started looking like it was about to work, this happened:
2013-03-13 21:47:08 [iNFO] [ForgeModLoader] Forge Mod Loader version 5.0.24.582 for Minecraft 1.5 loading
2013-03-13 21:47:09 [sEVERE] [ForgeModLoader] FML appears to be missing any signature data. This is not a good thing
2013-03-13 21:47:17 [iNFO] [sTDOUT] FMLRelauncher.relaunchApplet
2013-03-13 21:47:17 [iNFO] [sTDERR] java.lang.reflect.InvocationTargetException
2013-03-13 21:47:17 [iNFO] [sTDERR] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
2013-03-13 21:47:17 [iNFO] [sTDERR] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
2013-03-13 21:47:17 [iNFO] [sTDERR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
2013-03-13 21:47:17 [iNFO] [sTDERR] at java.lang.reflect.Method.invoke(Method.java:601)
2013-03-13 21:47:17 [iNFO] [sTDERR] at cpw.mods.fml.relauncher.FMLRelauncher.relaunchApplet(FMLRelauncher.java:244)
2013-03-13 21:47:17 [iNFO] [sTDERR] at cpw.mods.fml.relauncher.FMLRelauncher.appletEntry(FMLRelauncher.java:226)
2013-03-13 21:47:17 [iNFO] [sTDERR] at net.minecraft.client.MinecraftApplet.init(MinecraftApplet.java:25)
2013-03-13 21:47:17 [iNFO] [sTDERR] at net.minecraft.Launcher.replace(Launcher.java:143)
2013-03-13 21:47:17 [iNFO] [sTDERR] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
2013-03-13 21:47:17 [iNFO] [sTDERR] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
2013-03-13 21:47:17 [iNFO] [sTDERR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
2013-03-13 21:47:17 [iNFO] [sTDERR] at java.lang.reflect.Method.invoke(Method.java:601)
2013-03-13 21:47:17 [iNFO] [sTDERR] at cpw.mods.fml.relauncher.FMLRelauncher.relaunchApplet(FMLRelauncher.java:274)
2013-03-13 21:47:17 [iNFO] [sTDERR] at cpw.mods.fml.relauncher.FMLRelauncher.appletEntry(FMLRelauncher.java:226)
2013-03-13 21:47:17 [iNFO] [sTDERR] at net.minecraft.client.MinecraftApplet.init(MinecraftApplet.java:25)
2013-03-13 21:47:17 [iNFO] [sTDERR] at net.minecraft.Launcher.replace(Launcher.java:143)
2013-03-13 21:47:17 [iNFO] [sTDERR] at net.minecraft.Launcher$1.run(Launcher.java:87)
2013-03-13 21:47:17 [iNFO] [sTDERR] Caused by: java.lang.NoClassDefFoundError: net/minecraftforge/event/entity/player/ArrowNockEvent
2013-03-13 21:47:17 [iNFO] [sTDERR] at net.minecraft.item.Item.<clinit>(Item.java:45)
2013-03-13 21:47:17 [iNFO] [sTDERR] at net.minecraft.block.Block.<clinit>(Block.java:1370)
2013-03-13 21:47:17 [iNFO] [sTDERR] at net.minecraft.stats.StatList.func_75921_a(StatList.java:185)
2013-03-13 21:47:17 [iNFO] [sTDERR] at net.minecraft.stats.StatList.<clinit>(StatList.java:96)
2013-03-13 21:47:17 [iNFO] [sTDERR] at net.minecraft.client.Minecraft.<init>(Minecraft.java:290)
2013-03-13 21:47:17 [iNFO] [sTDERR] at net.minecraft.client.MinecraftAppletImpl.<init>(SourceFile:38)
2013-03-13 21:47:17 [iNFO] [sTDERR] at net.minecraft.client.MinecraftApplet.fmlInitReentry(MinecraftApplet.java:32)
2013-03-13 21:47:17 [iNFO] [sTDERR] ... 17 more
2013-03-13 21:47:17 [iNFO] [sTDERR] Caused by: java.lang.ClassNotFoundException: net.minecraftforge.event.entity.player.ArrowNockEvent
2013-03-13 21:47:17 [iNFO] [sTDERR] at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLoader.java:210)
2013-03-13 21:47:17 [iNFO] [sTDERR] at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
2013-03-13 21:47:17 [iNFO] [sTDERR] at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
2013-03-13 21:47:17 [iNFO] [sTDERR] ... 24 more
2013-03-13 21:47:17 [iNFO] [sTDERR] Caused by: java.lang.NoClassDefFoundError: net/minecraftforge/event/entity/player/PlayerEvent
2013-03-13 21:47:17 [iNFO] [sTDERR] at java.lang.ClassLoader.defineClass1(Native Method)
2013-03-13 21:47:17 [iNFO] [sTDERR] at java.lang.ClassLoader.defineClass(ClassLoader.java:787)
2013-03-13 21:47:17 [iNFO] [sTDERR] at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
2013-03-13 21:47:17 [iNFO] [sTDERR] at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLoader.java:199)
2013-03-13 21:47:17 [iNFO] [sTDERR] ... 26 more
2013-03-13 21:47:17 [iNFO] [sTDERR] Caused by: java.lang.ClassNotFoundException: net.minecraftforge.event.entity.player.PlayerEvent
2013-03-13 21:47:17 [iNFO] [sTDERR] at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLoader.java:112)
2013-03-13 21:47:17 [iNFO] [sTDERR] at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
2013-03-13 21:47:17 [iNFO] [sTDERR] at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
2013-03-13 21:47:17 [iNFO] [sTDERR] ... 30 more
2013-03-13 21:47:17 [iNFO] [sTDERR] Exception in thread "Thread-3" java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
2013-03-13 21:47:17 [iNFO] [sTDERR] at cpw.mods.fml.relauncher.FMLRelauncher.relaunchApplet(FMLRelauncher.java:284)
2013-03-13 21:47:17 [iNFO] [sTDERR] at cpw.mods.fml.relauncher.FMLRelauncher.appletEntry(FMLRelauncher.java:226)
2013-03-13 21:47:17 [iNFO] [sTDERR] at net.minecraft.client.MinecraftApplet.init(MinecraftApplet.java:25)
2013-03-13 21:47:17 [iNFO] [sTDERR] at net.minecraft.Launcher.replace(Launcher.java:143)
2013-03-13 21:47:17 [iNFO] [sTDERR] at net.minecraft.Launcher$1.run(Launcher.java:87)
2013-03-13 21:47:17 [iNFO] [sTDERR] Caused by: java.lang.reflect.InvocationTargetException
2013-03-13 21:47:17 [iNFO] [sTDERR] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
2013-03-13 21:47:17 [iNFO] [sTDERR] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
2013-03-13 21:47:17 [iNFO] [sTDERR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
2013-03-13 21:47:17 [iNFO] [sTDERR] at java.lang.reflect.Method.invoke(Method.java:601)
2013-03-13 21:47:17 [iNFO] [sTDERR] at cpw.mods.fml.relauncher.FMLRelauncher.relaunchApplet(FMLRelauncher.java:274)
2013-03-13 21:47:17 [iNFO] [sTDERR] ... 4 more
2013-03-13 21:47:17 [iNFO] [sTDERR] Caused by: java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
2013-03-13 21:47:17 [iNFO] [sTDERR] at cpw.mods.fml.relauncher.FMLRelauncher.relaunchApplet(FMLRelauncher.java:251)
2013-03-13 21:47:17 [iNFO] [sTDERR] at cpw.mods.fml.relauncher.FMLRelauncher.appletEntry(FMLRelauncher.java:226)
2013-03-13 21:47:17 [iNFO] [sTDERR] at net.minecraft.client.MinecraftApplet.init(MinecraftApplet.java:25)
2013-03-13 21:47:17 [iNFO] [sTDERR] at net.minecraft.Launcher.replace(Launcher.java:143)
2013-03-13 21:47:17 [iNFO] [sTDERR] ... 9 more
2013-03-13 21:47:17 [iNFO] [sTDERR] Caused by: java.lang.reflect.InvocationTargetException
2013-03-13 21:47:17 [iNFO] [sTDERR] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
2013-03-13 21:47:17 [iNFO] [sTDERR] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
2013-03-13 21:47:17 [iNFO] [sTDERR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
2013-03-13 21:47:17 [iNFO] [sTDERR] at java.lang.reflect.Method.invoke(Method.java:601)
2013-03-13 21:47:17 [iNFO] [sTDERR] at cpw.mods.fml.relauncher.FMLRelauncher.relaunchApplet(FMLRelauncher.java:244)
2013-03-13 21:47:17 [iNFO] [sTDERR] ... 12 more
2013-03-13 21:47:17 [iNFO] [sTDERR] Caused by: java.lang.NoClassDefFoundError: net/minecraftforge/event/entity/player/ArrowNockEvent
2013-03-13 21:47:17 [iNFO] [sTDERR] at net.minecraft.item.Item.<clinit>(Item.java:45)
2013-03-13 21:47:17 [iNFO] [sTDERR] at net.minecraft.block.Block.<clinit>(Block.java:1370)
2013-03-13 21:47:17 [iNFO] [sTDERR] at net.minecraft.stats.StatList.func_75921_a(StatList.java:185)
2013-03-13 21:47:17 [iNFO] [sTDERR] at net.minecraft.stats.StatList.<clinit>(StatList.java:96)
2013-03-13 21:47:17 [iNFO] [sTDERR] at net.minecraft.client.Minecraft.<init>(Minecraft.java:290)
2013-03-13 21:47:17 [iNFO] [sTDERR] at net.minecraft.client.MinecraftAppletImpl.<init>(SourceFile:38)
2013-03-13 21:47:17 [iNFO] [sTDERR] at net.minecraft.client.MinecraftApplet.fmlInitReentry(MinecraftApplet.java:32)
2013-03-13 21:47:17 [iNFO] [sTDERR] ... 17 more
2013-03-13 21:47:17 [iNFO] [sTDERR] Caused by: java.lang.ClassNotFoundException: net.minecraftforge.event.entity.player.ArrowNockEvent
2013-03-13 21:47:17 [iNFO] [sTDERR] at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLoader.java:210)
2013-03-13 21:47:17 [iNFO] [sTDERR] at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
2013-03-13 21:47:17 [iNFO] [sTDERR] at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
2013-03-13 21:47:17 [iNFO] [sTDERR] ... 24 more
2013-03-13 21:47:17 [iNFO] [sTDERR] Caused by: java.lang.NoClassDefFoundError: net/minecraftforge/event/entity/player/PlayerEvent
2013-03-13 21:47:17 [iNFO] [sTDERR] at java.lang.ClassLoader.defineClass1(Native Method)
2013-03-13 21:47:17 [iNFO] [sTDERR] at java.lang.ClassLoader.defineClass(ClassLoader.java:787)
2013-03-13 21:47:17 [iNFO] [sTDERR] at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
2013-03-13 21:47:17 [iNFO] [sTDERR] at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLoader.java:199)
2013-03-13 21:47:17 [iNFO] [sTDERR] ... 26 more
2013-03-13 21:47:17 [iNFO] [sTDERR] Caused by: java.lang.ClassNotFoundException: net.minecraftforge.event.entity.player.PlayerEvent
2013-03-13 21:47:17 [iNFO] [sTDERR] at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLoader.java:112)
2013-03-13 21:47:17 [iNFO] [sTDERR] at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
2013-03-13 21:47:17 [iNFO] [sTDERR] at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
2013-03-13 21:47:17 [iNFO] [sTDERR] ... 30 more
Can anyone help me?