SMP Server crash when leaving chunk with pipes.

What steps will reproduce the problem?
1.Having a system of BC(BuildCraft) Liquid Teleport Pipes(5 sets)
2.Leaving the chunk 
3.

What is the expected output? What do you see instead?
Just went back to my base to collect/craft more pipes in order to setup a 
quarry. Had the exact same setup earlier but for some reason I keep crashing 
whenever that chunk unloads on the server.

What version are you using?
Rev 26, whatever is in the SMP version of the Technic pack v0.0.4.

Please provide your Console/ModLoader output below.

2011-12-14 11:00:00 [SEVERE] Unexpected exception
java.util.ConcurrentModificationException
at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:782)
at java.util.ArrayList$Itr.next(ArrayList.java:754)
at mod_zAdditionalPipes.OnTickInGame(mod_zAdditionalPipes.java:155)
at ModLoader.OnTick(ModLoader.java:772)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:266)
at ce.run(SourceFile:417)

When I look in the modloader log it shows nothing of the crash or any errors.

Please provide any additional information below.

Not sure what could be causing this. Tried using less of the teleport pipes and 
seemed fine for a bit then crashed again. Would rather not resort to using only 
original BC pipes due to the convience.

I'm not exactly sure how this can be recreated but I noticed I cannot reconnect 
to the server unless it is restarted. My friend who runs it said it was up and 
fine when I was having troubles. Said I was still connected to the server which 
I was not.
Please provide any screenshots you feel would help demonstrate this
issue/feature.

Original issue reported on code.google.com by yakumo...@gmail.com on 14 Dec 2011 at 5:41

spaceboy01218 / additional-pipes

SMP Server crash when leaving chunk with pipes. #127