LiMI - Lightweight Mod Indicator

LiMI.java

package vazkii.limi;

import net.minecraftforge.common.MinecraftForge;
import net.minecraftforge.common.config.Configuration;
import net.minecraftforge.event.entity.player.ItemTooltipEvent;
import cpw.mods.fml.common.Loader;
import cpw.mods.fml.common.Mod;
import cpw.mods.fml.common.Mod.EventHandler;
import cpw.mods.fml.common.ModContainer;
import cpw.mods.fml.common.event.FMLPreInitializationEvent;
import cpw.mods.fml.common.eventhandler.SubscribeEvent;
import cpw.mods.fml.common.registry.GameData;

@Mod(modid = "LiMI", name = "LiMI", version = "1.0")
public class LiMI {

	String formatting;
	
	@EventHandler
	public void preInit(FMLPreInitializationEvent event) {
		MinecraftForge.EVENT_BUS.register(this);
		
		Configuration config = new Configuration(event.getSuggestedConfigurationFile());
		config.load();
		formatting = config.getString("formatting", Configuration.CATEGORY_GENERAL, "&e&o", "The formatting codes to use in the tooltip. Use & to substitute for the control character.");
		if(config.hasChanged())
			config.save();
	}
	
	@SubscribeEvent
	public void onTooltip(ItemTooltipEvent event) {
		String itemName = GameData.getItemRegistry().getNameForObject(event.itemStack.getItem());
		ModContainer mod = Loader.instance().getIndexedModList().get(itemName.split(":")[0]);
		String name = mod == null ? "Minecraft" : mod.getName();
		event.toolTip.add(formatting.replaceAll("&", "\u00a7") + name);
	}
	
}

I got this crash with this when I opened up the creative menu on the search tab. http://pastebin.com/ymq0AtgL

@Vazkii, I'm seeing a weird item tooltip exception with your mod: http://pastebin.com/20VWSrdV