[11:30:05] dre46: 12:30:38 [WARNING] Failed to log to server.log
java.lang.StringIndexOutOfBoundsException: String index out of range: 0
   at java.lang.String.charAt(libgcj.so.10)
   at java.io.File.getParent(libgcj.so.10)
   at java.io.File.mkdirs(libgcj.so.10)
   at java.io.File.mkdirs(libgcj.so.10)
   at net.minecraft.server.ConsoleLogManager.init(ConsoleLogManager.java:86)
erver.init(DedicatedServer.java:43)dS
   at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:380)
   at net.minecraft.server.ThreadServerApplication.run(SourceFile:539)
12:30:38 [INFO] Starting minecraft server version 1.3.1
12:30:38 [INFO] Loading properties
12:30:38 [INFO] Default game type: SURVIVAL
12:30:38 [INFO] Generating keypair
12:30:38 [INFO] Starting Minecraft server on *:25565
12:30:39 [WARNING] **** FAILED TO BIND TO PORT!
12:30:39 [WARNING] The exception was: java.lang.NoSuchMethodError: method java.net.ServerSocket.setPerformancePreferences with signature (III)V was not found.
12:30:39 [WARNING] Perhaps a server is already running on that port?