2011-02-24 20:29:10 [SEVERE] java.util.ConcurrentModificationException
2011-02-24 20:29:10 [SEVERE]    at java.util.HashMap$HashIterator.nextEntry(HashMap.java:848)
2011-02-24 20:29:10 [SEVERE]    at java.util.HashMap$KeyIterator.next(HashMap.java:883)
2011-02-24 20:29:10 [SEVERE]    at net.minecraft.server.EntityTracker.a(EntityTracker.java:106)
2011-02-24 20:29:10 [SEVERE]    at net.minecraft.server.MinecraftServer.h(MinecraftServer.java:340)
2011-02-24 20:29:10 [SEVERE]    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:253)
2011-02-24 20:29:10 [SEVERE]    at net.minecraft.server.ThreadServerApplication.run(SourceFile:366)
2011-02-24 20:29:10 [SEVERE] Unexpected exception
java.util.ConcurrentModificationException
        at java.util.HashMap$HashIterator.nextEntry(HashMap.java:848)
        at java.util.HashMap$KeyIterator.next(HashMap.java:883)
        at net.minecraft.server.EntityTracker.a(EntityTracker.java:106)
        at net.minecraft.server.MinecraftServer.h(MinecraftServer.java:340)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:253)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:366)
2011-02-24 20:30:20 [SEVERE] java.net.SocketException: Connection reset
2011-02-24 20:30:20 [SEVERE]    at java.net.SocketInputStream.read(SocketInputStream.java:168)
2011-02-24 20:30:20 [SEVERE]    at java.net.SocketInputStream.read(SocketInputStream.java:182)
2011-02-24 20:30:20 [SEVERE]    at java.io.FilterInputStream.read(FilterInputStream.java:66)
2011-02-24 20:30:20 [SEVERE]    at net.minecraft.server.Packet.b(SourceFile:113)
2011-02-24 20:30:20 [SEVERE]    at net.minecraft.server.NetworkManager.f(SourceFile:155)
2011-02-24 20:30:20 [SEVERE]    at net.minecraft.server.NetworkManager.c(SourceFile:9)
2011-02-24 20:30:20 [SEVERE]    at net.minecraft.server.NetworkReaderThread.run(SourceFile:62)
2011-02-24 20:31:09 [SEVERE] java.net.SocketException: Connection reset
2011-02-24 20:31:09 [SEVERE]    at java.net.SocketInputStream.read(SocketInputStream.java:168)
2011-02-24 20:31:09 [SEVERE]    at java.net.SocketInputStream.read(SocketInputStream.java:182)
2011-02-24 20:31:09 [SEVERE]    at java.io.FilterInputStream.read(FilterInputStream.java:66)
2011-02-24 20:31:09 [SEVERE]    at net.minecraft.server.Packet.b(SourceFile:113)
2011-02-24 20:31:09 [SEVERE]    at net.minecraft.server.NetworkManager.f(SourceFile:155)
2011-02-24 20:31:09 [SEVERE]    at net.minecraft.server.NetworkManager.c(SourceFile:9)
2011-02-24 20:31:09 [SEVERE]    at net.minecraft.server.NetworkReaderThread.run(SourceFile:62)