Error in <reader>?

We are using CraftBukkit build 1000:

Error: (open) Error: (close)

Code:

2011-08-05 19:55:53 [INFO] Starting minecraft server version Beta 1.7.3
2011-08-05 19:55:53 [INFO] Loading properties
2011-08-05 19:55:53 [INFO] Starting Minecraft server on *:25565
2011-08-05 19:55:53 [INFO] This server is running Craftbukkit version git-Bukkit-0.0.0-958-g65a55ba-b1038jnks (MC: 1.7.3)
2011-08-05 19:55:53 [SEVERE] unacceptable character #0 special characters are not allowed
in "<reader>", position 0
2011-08-05 19:55:53 [SEVERE] 	at org.yaml.snakeyaml.reader.StreamReader.checkPrintable(StreamReader.java:68)
2011-08-05 19:55:53 [SEVERE] 	at org.yaml.snakeyaml.reader.StreamReader.update(StreamReader.java:159)
2011-08-05 19:55:53 [SEVERE] 	at org.yaml.snakeyaml.reader.StreamReader.peek(StreamReader.java:117)
2011-08-05 19:55:53 [SEVERE] 	at org.yaml.snakeyaml.reader.StreamReader.peek(StreamReader.java:106)
2011-08-05 19:55:53 [SEVERE] 	at org.yaml.snakeyaml.scanner.ScannerImpl.scanToNextToken(ScannerImpl.java:964)
2011-08-05 19:55:53 [SEVERE] 	at org.yaml.snakeyaml.scanner.ScannerImpl.fetchMoreTokens(ScannerImpl.java:237)
2011-08-05 19:55:53 [SEVERE] 	at org.yaml.snakeyaml.scanner.ScannerImpl.checkToken(ScannerImpl.java:183)
2011-08-05 19:55:53 [SEVERE] 	at org.yaml.snakeyaml.parser.ParserImpl$ParseImplicitDocumentStart.produce(ParserImpl.java:200)
2011-08-05 19:55:53 [SEVERE] 	at org.yaml.snakeyaml.parser.ParserImpl.peekEvent(ParserImpl.java:163)
2011-08-05 19:55:53 [SEVERE] 	at org.yaml.snakeyaml.parser.ParserImpl.checkEvent(ParserImpl.java:148)
2011-08-05 19:55:53 [SEVERE] 	at org.yaml.snakeyaml.composer.Composer.getSingleNode(Composer.java:104)
2011-08-05 19:55:53 [SEVERE] 	at org.yaml.snakeyaml.constructor.BaseConstructor.getSingleData(BaseConstructor.java:124)
2011-08-05 19:55:53 [SEVERE] 	at org.yaml.snakeyaml.Yaml.load(Yaml.java:264)
2011-08-05 19:55:53 [SEVERE] 	at org.bukkit.util.config.Configuration.load(Configuration.java:82)
2011-08-05 19:55:53 [SEVERE] 	at org.bukkit.craftbukkit.CraftServer.loadConfig(CraftServer.java:102)
2011-08-05 19:55:53 [SEVERE] 	at org.bukkit.craftbukkit.CraftServer.<init>(CraftServer.java:96)
2011-08-05 19:55:53 [SEVERE] 	at net.minecraft.server.ServerConfigurationManager.<init>(ServerConfigurationManager.java:51)
2011-08-05 19:55:53 [SEVERE] 	at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:132)
2011-08-05 19:55:53 [SEVERE] 	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:335)
2011-08-05 19:55:53 [SEVERE] 	at net.minecraft.server.ThreadServerApplication.run(SourceFile:422)
2011-08-05 19:55:53 [SEVERE] Unexpected exception
unacceptable character #0 special characters are not allowed
in "<reader>", position 0
	at org.yaml.snakeyaml.reader.StreamReader.checkPrintable(StreamReader.java:68)
	at org.yaml.snakeyaml.reader.StreamReader.update(StreamReader.java:159)
	at org.yaml.snakeyaml.reader.StreamReader.peek(StreamReader.java:117)
	at org.yaml.snakeyaml.reader.StreamReader.peek(StreamReader.java:106)
	at org.yaml.snakeyaml.scanner.ScannerImpl.scanToNextToken(ScannerImpl.java:964)
	at org.yaml.snakeyaml.scanner.ScannerImpl.fetchMoreTokens(ScannerImpl.java:237)
	at org.yaml.snakeyaml.scanner.ScannerImpl.checkToken(ScannerImpl.java:183)
	at org.yaml.snakeyaml.parser.ParserImpl$ParseImplicitDocumentStart.produce(ParserImpl.java:200)
	at org.yaml.snakeyaml.parser.ParserImpl.peekEvent(ParserImpl.java:163)
	at org.yaml.snakeyaml.parser.ParserImpl.checkEvent(ParserImpl.java:148)
	at org.yaml.snakeyaml.composer.Composer.getSingleNode(Composer.java:104)
	at org.yaml.snakeyaml.constructor.BaseConstructor.getSingleData(BaseConstructor.java:124)
	at org.yaml.snakeyaml.Yaml.load(Yaml.java:264)
	at org.bukkit.util.config.Configuration.load(Configuration.java:82)
	at org.bukkit.craftbukkit.CraftServer.loadConfig(CraftServer.java:102)
	at org.bukkit.craftbukkit.CraftServer.<init>(CraftServer.java:96)
	at net.minecraft.server.ServerConfigurationManager.<init>(ServerConfigurationManager.java:51)
	at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:132)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:335)
	at net.minecraft.server.ThreadServerApplication.run(SourceFile:422)

Plugins we are using:

Plugins: (open) Plugins: (close)

AdminChat
Administrate
AutoSave
BetterShop
CommandBook
CraftBookCircuits
CraftBookCommon
CraftBookMechanisms
CraftBookVehicles
iConomy
Jail
LWC
MagicCarpet
MonsterBox
MotherNature
MultiVerse
MyHome
nChat
NoWeather
PistonPlugin
Playtime
ScheduledAnnouncer
SignOwner
SimpleSave
Stackable
TD
TelePlusPlus
ToughMelt
VanishNoPickup
War
WatchPM
WorldEdit
WorldGuard
xWarp