friends buildcraft pipe problem

[x3ndless]

Title: friends buildcraft pipe problem

Version: 3.1.2

OS: windows

Java Version: 7

Description of Problem:

Im guessing its from whenever someone places a buildcraft pipe.

Error Messages:

one

Error Log:

[sEVERE]  at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:819)

05:49:13 [sEVERE]  at java.util.ArrayList$Itr.next(ArrayList.java:791)

05:49:13 [sEVERE]  at net.minecraft.server.World.getTileEntity(World.java:1644)

05:49:13 [sEVERE]  at net.minecraft.server.WorldServer.getTileEntity(WorldServer.java:45)

05:49:13 [sEVERE]  at buildcraft.transport.BlockGenericPipe.isPipeConnected(BlockGenericPipe.java:310)

05:49:13 [sEVERE]  at buildcraft.core.Utils.checkPipesConnections(Utils.java:348)

05:49:13 [sEVERE]  at buildcraft.transport.PipeTransportPower.updateEntity(PipeTransportPower.java:58)

05:49:13 [sEVERE]  at buildcraft.transport.Pipe.updateEntity(Pipe.java:106)

05:49:13 [sEVERE]  at buildcraft.transport.TileGenericPipe.q_(TileGenericPipe.java:156)

05:49:13 [sEVERE]  at net.minecraft.server.World.tickEntities(World.java:1190)

05:49:13 [sEVERE]  at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:569)

05:49:13 [sEVERE]  at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:467)

05:49:13 [sEVERE]  at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)

05:49:13 [sEVERE] Unexpected exception

java.util.ConcurrentModificationException

 at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:819)

 at java.util.ArrayList$Itr.next(ArrayList.java:791)

 at net.minecraft.server.World.getTileEntity(World.java:1644)

 at net.minecraft.server.WorldServer.getTileEntity(WorldServer.java:45)

 at buildcraft.transport.BlockGenericPipe.isPipeConnected(BlockGenericPipe.java:310)

 at buildcraft.core.Utils.checkPipesConnections(Utils.java:348)

 at buildcraft.transport.PipeTransportPower.updateEntity(PipeTransportPower.java:58)

 at buildcraft.transport.Pipe.updateEntity(Pipe.java:106)

 at buildcraft.transport.TileGenericPipe.q_(TileGenericPipe.java:156)

 at net.minecraft.server.World.tickEntities(World.java:1190)

 at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:569)

 at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:467)

 at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)

[M4jorpain]

I think I have the same problem. When my server start, everythin is fine but if somebody joins I get this error message:

at java.util.HashMap.get(Unknown Source)

at net.minecraft.server.Chunk.e(Chunk.java:618)

at net.minecraft.server.World.getTileEntity(World.java:1638)

at net.minecraft.server.WorldServer.getTileEntity(WorldServer.java:45)

at buildcraft.transport.BlockGenericPipe.isPipeConnected(BlockGenericPipe.java:310)

at buildcraft.core.Utils.checkPipesConnections(Utils.java:348)

at buildcraft.additionalpipes.pipes.PipePowerTeleport.canReceivePower(PipePowerTeleport.java:171)

at buildcraft.additionalpipes.pipes.PipePowerTeleport.getRealPossibleMovements(PipePowerTeleport.java:158)

and than this one like a 100 times:

at buildcraft.additionalpipes.pipes.PipePowerTeleport.requestEnergy(PipePowerTeleport.java:220)

at buildcraft.transport.PipeTransportPower.requestEnergy(PipeTransportPower.java:203)

Do you have this problem too?