bukkit.yml
# This is the main configuration file for Bukkit.
# As you can see, there's actually not that much to configure without any plugins.
# For a reference for any variable inside this file, check out the bukkit wiki at
# http://wiki.bukkit.org/Bukkit.yml
settings:
  allow-end: false
  warn-on-overload: true
  permissions-file: permissions.yml
  update-folder: update
  ping-packet-limit: 100
  use-exact-login-location: false
  plugin-profiling: false
  connection-throttle: 4000
  query-plugins: true
  deprecated-verbose: default
  restart-script-location: start.bat
  timeout-time: 180
  restart-on-crash: true
  stop-message: Server is restarting, try again in 60 seconds :)
  filter-unsafe-ips: false
  whitelist-message: Server is under maintance, try again later.
  log-commands: true
  command-complete: true
  spam-exclusions:
  - /skill
world-settings:
  default:
    growth-chunks-per-tick: 650
    mob-spawn-range: 4
    item-merge-radius: 3.5
    random-light-updates: false
    aggregate-chunkticks: 4
    wheat-growth-modifier: 100
    cactus-growth-modifier: 100
    melon-growth-modifier: 100
    pumpkin-growth-modifier: 100
    sugar-growth-modifier: 100
    tree-growth-modifier: 100
    mushroom-growth-modifier: 100
  world:
    growth-chunks-per-tick: 1000
  world_nether:
    growth-chunks-per-tick: 0
    random-light-updates: true
    water-creatures-per-chunk: 0
storm-settings:
  strong-electrical-storm:
    chance: 5
    lightning-delay: 10
    lightning-random-delay: 20
  electrical-storm:
    chance: 15
    lightning-delay: 40
    lightning-random-delay: 150
  strong-thunderstorm:
    chance: 30
    lightning-delay: 60
    lightning-random-delay: 250
  thunderstorm:
    chance: 50
    lightning-delay: 100
    lightning-random-delay: 500
  weak-thunderstorm:
    chance: 75
    lightning-delay: 300
    lightning-random-delay: 1000
  rainstorm:
    chance: 100
    lightning-delay: 500
    lightning-random-delay: 2000
spawn-limits:
  monsters: 70
  animals: 15
  water-animals: 5
  ambient: 15
ticks-per:
  animal-spawns: 400
  monster-spawns: 1
  autosave: 0
auto-updater:
  enabled: false
  on-broken:
  - warn-console
  - warn-ops
  on-update:
  - warn-console
  - warn-ops
  preferred-channel: dev
  host: dl.bukkit.org
  suggest-channels: true
database:
  username: bukkit
  isolation: SERIALIZABLE
  driver: org.sqlite.JDBC
  password: walrus
  url: jdbc:sqlite:{DIR}{NAME}.db

Error:
2012-11-24 23:41:36 [WARNING] Failed to handle packet for SwiftSwamp/66.61.22.5: java.lang.NullPointerException
java.lang.NullPointerException
	at net.minecraft.server.World.addEntity(World.java:945)
	at net.minecraft.server.World.addEntity(World.java:904)
	at net.minecraft.server.EntityHuman.a(EntityHuman.java:454)
	at net.minecraft.server.EntityHuman.a(EntityHuman.java:447)
	at net.minecraft.server.EntityHuman.bR(EntityHuman.java:397)
	at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:501)
	at net.minecraft.server.Packet14BlockDig.handle(SourceFile:46)
	at net.minecraft.server.NetworkManager.b(NetworkManager.java:290)
	at net.minecraft.server.NetServerHandler.d(NetServerHandler.java:113)
	at net.minecraft.server.ServerConnection.b(SourceFile:39)
	at net.minecraft.server.DedicatedServerConnection.b(SourceFile:30)
	at net.minecraft.server.MinecraftServer.r(MinecraftServer.java:596)
	at net.minecraft.server.DedicatedServer.r(DedicatedServer.java:222)
	at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:494)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:426)
	at net.minecraft.server.ThreadServerApplication.run(SourceFile:856)