it was fine yesterday and i tried to turn it back on and I get this random crash...
I did not install anything new, everything was the way it was
here is the crash log
---- Minecraft Crash Report ----
// This doesn't make any sense!

Time: 5/10/14 8:38 AM
Description: Initializing game

java.lang.NoSuchMethodError: net.minecraft.client.renderer.texture.TextureMap.setTextureEntry(Ljava/lang/String;Lnet/minecraft/client/renderer/texture/TextureAtlasSprite;)Z
at mods.railcraft.client.util.textures.TextureAtlasSheet.unstitchIcons(TextureAtlasSheet.java:46)
at mods.railcraft.client.util.textures.TextureAtlasSheet.unstitchIcons(TextureAtlasSheet.java:36)
at mods.railcraft.common.blocks.detector.BlockDetector.func_94332_a(BlockDetector.java:223)
at net.minecraft.client.renderer.texture.TextureMap.func_110573_f(TextureMap.java:150)
at net.minecraft.client.renderer.texture.TextureMap.(TextureMap.java:29)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:505)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:808)
at net.minecraft.client.main.Main.main(SourceFile:101)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:131)
at net.minecraft.launchwrapper.Launch.main(Launch.java:27)

was using 8.3.20 but crash happened so I switched to 8.4 still crashes