Exception in thread "Minecraft main thread" java.lang.ExceptionInInitializerError
	at net.minecraft.client.Minecraft.startGame(Minecraft.java:394)
	at net.minecraft.client.Minecraft.run(Minecraft.java:732)
	at java.lang.Thread.run(Thread.java:662)
Caused by: java.lang.RuntimeException: java.lang.NoSuchFieldError: fontRandom
	at net.minecraft.src.ModLoader.init(ModLoader.java:897)
	at net.minecraft.src.ModLoader.addAllRenderers(ModLoader.java:154)
	at net.minecraft.src.RenderManager.<init>(RenderManager.java:86)
	at net.minecraft.src.RenderManager.<clinit>(RenderManager.java:14)
	... 3 more
Caused by: java.lang.NoSuchFieldError: fontRandom
	at dan200.computer.client.FixedWidthFontRenderer.<init>(FixedWidthFontRenderer.java:37)
	at net.minecraft.src.mod_ComputerCraft.load(mod_ComputerCraft.java:187)
	at net.minecraft.src.ModLoader.init(ModLoader.java:861)
	... 6 more