Reporter: ---- Minecraft Crash Report ---- // Hey, that tickles! Hehehe! Time: 03/08/12 17.00 Description: Exception in server tick loop java.util.ConcurrentModificationException at java.util.ArrayList$Itr.checkForComodification(Unknown Source) at java.util.ArrayList$Itr.next(Unknown Source) at net.minecraft.server.PlayerManager.flush(PlayerManager.java:36) at net.minecraft.server.WorldServer.doTick(WorldServer.java:172) at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:536) at net.minecraft.server.DedicatedServer.q(DedicatedServer.java:212) at net.minecraft.server.MinecraftServer.p(MinecraftServer.java:474) at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:406) at net.minecraft.server.ThreadServerApplication.run(SourceFile:539) Relevant Details: - Minecraft Version: 1.3.1 - Operating System: Windows 7 (amd64) version 6.1 - Java Version: 1.7.0_05, Oracle Corporation - Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation - Memory: 3361385224 bytes (3205 MB) / 3701014528 bytes (3529 MB) up to 4174970880 bytes (3981 MB) - JVM Flags: 19 total; -Xmx4000M -Xms3548M -XXarallelGCThreads=4 -Xincgc -XX:+UseConcMarkSweepGC -XX:+UseParNewGC -XX:+CMSIncrementalPacing -XX:+AggressiveOpts -XX:+CMSParallelRemarkEnabled -XX:+DisableExplicitGC -XX:MaxGCPauseMillis=500 -XX:SurvivorRatio=16 -XX:TargetSurvivorRatio=90 -XX:+UseAdaptiveGCBoundary -XX:-UseGCOverheadLimit -Xnoclassgc -XX:UseSSE=3 -XXermSize=128m -XX:LargePageSizeInBytes=4m - Type: Dedicated Server - Is Modded: Definitely; 'craftbukkit