2011-02-11 04:29:17 [INFO] [PLAYER_COMMAND] chill1977: /world nether
Player count: 1
2011-02-11 04:29:29 [WARNING] chill1977 moved wrongly!
Got position 0.5, 64.0, 0.5
Expected 72.30000001192093, 65.0, -36.30000001192093
2011-02-11 04:29:29 [WARNING] Can't keep up! Did the system time change, or is t
he server overloaded?
2011-02-11 04:29:31 [WARNING] Can't keep up! Did the system time change, or is t
he server overloaded?
Player count: 1
2011-02-11 04:30:20 [INFO] [PLAYER_COMMAND] chill1977: /world normal
java.lang.NullPointerException
        at net.minecraft.server.World.a(World.java:1408)
        at net.minecraft.server.World.a(World.java:1381)
        at net.minecraft.server.World.a(World.java:579)
        at net.minecraft.server.MetadataChunkBlock.a(SourceFile:107)
        at net.minecraft.server.World.d(World.java:1369)
        at net.minecraft.server.MinecraftServer.h(MinecraftServer.java:309)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:232)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:512)
2011-02-11 04:30:30 [SEVERE] Unexpected exception
java.lang.NullPointerException
        at net.minecraft.server.World.a(World.java:1408)
        at net.minecraft.server.World.a(World.java:1381)
        at net.minecraft.server.World.a(World.java:579)
        at net.minecraft.server.MetadataChunkBlock.a(SourceFile:107)
        at net.minecraft.server.World.d(World.java:1369)
        at net.minecraft.server.MinecraftServer.h(MinecraftServer.java:309)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:232)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:512)
Player count: 1