It happens when i open NEI. Time: 09.08.13 22:38 Description: Rendering screen java.lang.NullPointerException at net.minecraft.item.ItemStack.<init>(ItemStack.java:67) at net.minecraft.creativetab.CreativeTabs.getIconItemStack(CreativeTabs.java:209) at net.minecraft.client.gui.inventory.GuiContainerCreative.func_74233_a(GuiContainerCreative.java:905) at net.minecraft.client.gui.inventory.GuiContainerCreative.func_74185_a(GuiContainerCreative.java:731) at net.minecraft.client.gui.inventory.GuiContainer.func_73863_a(GuiContainer.java:124) at net.minecraft.client.renderer.InventoryEffectRenderer.func_73863_a(SourceFile:31) at net.minecraft.client.gui.inventory.GuiContainerCreative.func_73863_a(GuiContainerCreative.java:664) at net.minecraft.client.renderer.EntityRenderer.func_78480_b(EntityRenderer.java:1156) at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:871) at net.minecraft.client.Minecraft.run(Minecraft.java:760) at java.lang.Thread.run(Unknown Source) A detailed walkthrough of the error, its code path and all known details is as follows: --------------------------------------------------------------------------------------- -- Head -- Stacktrace: at net.minecraft.item.ItemStack.<init>(ItemStack.java:67) at net.minecraft.creativetab.CreativeTabs.getIconItemStack(CreativeTabs.java:209) at net.minecraft.client.gui.inventory.GuiContainerCreative.func_74233_a(GuiContainerCreative.java:905) at net.minecraft.client.gui.inventory.GuiContainerCreative.func_74185_a(GuiContainerCreative.java:731) at net.minecraft.client.gui.inventory.GuiContainer.func_73863_a(GuiContainer.java:124) at net.minecraft.client.renderer.InventoryEffectRenderer.func_73863_a(SourceFile:31) at net.minecraft.client.gui.inventory.GuiContainerCreative.func_73863_a(GuiContainerCreative.java:664) -- Screen render details -- Details: Screen name: net.minecraft.client.gui.inventory.GuiContainerCreative Mouse location: Scaled: (404, 71). Absolute: (808, 576) Screen size: Scaled: (640, 360). Absolute: (1280, 720). Scale factor of 2