Random Crash

[Plaer]

Just loaded my world and this happen

java.util.ConcurrentModificationException
at java.util.ArrayList$Itr.checkForComodification(Unknown Source)
at java.util.ArrayList$Itr.next(Unknown Source)
at am2.particles.ParticleRenderer.updateParticles(ParticleRenderer.java:126)
at am2.particles.ParticleRenderer.tickEnd(ParticleRenderer.java:97)
at cpw.mods.fml.common.SingleIntervalHandler.tickEnd(SingleIntervalHandler.java:34)
at cpw.mods.fml.common.FMLCommonHandler.tickEnd(FMLCommonHandler.java:141)
at cpw.mods.fml.common.FMLCommonHandler.onPostClientTick(FMLCommonHandler.java:367)
at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1970)
at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:910)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:838)
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)

A detailed walkthrough of the error, its code path and all known details is as follows:

-- Head --
Stacktrace:
at java.util.ArrayList$Itr.checkForComodification(Unknown Source)
at java.util.ArrayList$Itr.next(Unknown Source)
at am2.particles.ParticleRenderer.updateParticles(ParticleRenderer.java:126)
at am2.particles.ParticleRenderer.tickEnd(ParticleRenderer.java:97)
at cpw.mods.fml.common.SingleIntervalHandler.tickEnd(SingleIntervalHandler.java:34)
at cpw.mods.fml.common.FMLCommonHandler.tickEnd(FMLCommonHandler.java:141)
at cpw.mods.fml.common.FMLCommonHandler.onPostClientTick(FMLCommonHandler.java:367)

Tried to load it again and it didn't have a problem but it happen again while fighting a Dark Mage. The random crash started after installing Alpha More Enchantments Mod 8.

[Mithion]

Corrected in 1.2