Console errors with unacceptble characters

Guys, I am having a problem now. I had my server running all good in my machine, but when I uploaded it to a dedicated host, problems like this one started to show up:

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2014-11-24 15:25:13 [INFO] [mcMMO] Creating mcMMO spout.yml File...
2014-11-24 15:25:13 [INFO] algoz1257[/50.138.136.169:60018] logged in with entity id 517 at ([flatroom] 316.09790014953404, 9.419999986886978, -37.66750578509468)
2014-11-24 15:25:13 [SEVERE] Cannot load configuration from stream
org.bukkit.configuration.InvalidConfigurationException: unacceptable character '�' (0xFFFD) special characters are not allowed
in "<string>", position 33
at org.bukkit.configuration.file.YamlConfiguration.loadFromString(YamlConfiguration.java:55)
at org.bukkit.configuration.file.FileConfiguration.load(FileConfiguration.java:138)
at org.bukkit.configuration.file.YamlConfiguration.loadConfiguration(YamlConfiguration.java:202)
at org.bukkit.plugin.java.JavaPlugin.reloadConfig(JavaPlugin.java:121)
at org.bukkit.plugin.java.JavaPlugin.getConfig(JavaPlugin.java:111)
at me.devleeo.com.lsfirst.Main.onJoin(Main.java:35)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:425)
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:477)
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:462)
at net.minecraft.server.v1_5_R3.PlayerList.c(PlayerList.java:204)
at net.minecraft.server.v1_5_R3.PlayerList.a(PlayerList.java:100)
at net.minecraft.server.v1_5_R3.PendingConnection.d(PendingConnection.java:129)
at net.minecraft.server.v1_5_R3.PendingConnection.c(PendingConnection.java:44)
at net.minecraft.server.v1_5_R3.DedicatedServerConnectionThread.a(DedicatedServerConnectionThread.java:41)
at net.minecraft.server.v1_5_R3.DedicatedServerConnection.b(SourceFile:29)
at net.minecraft.server.v1_5_R3.MinecraftServer.r(MinecraftServer.java:581)
at net.minecraft.server.v1_5_R3.DedicatedServer.r(DedicatedServer.java:226)
at net.minecraft.server.v1_5_R3.MinecraftServer.q(MinecraftServer.java:477)
at net.minecraft.server.v1_5_R3.MinecraftServer.run(MinecraftServer.java:410)
at net.minecraft.server.v1_5_R3.ThreadServerApplication.run(SourceFile:573)
Caused by: unacceptable character '�' (0xFFFD) special characters are not allowed
in "<string>", position 33
at org.yaml.snakeyaml.reader.StreamReader.checkPrintable(StreamReader.java:70)
at org.yaml.snakeyaml.reader.StreamReader.<init>(StreamReader.java:50)
at org.yaml.snakeyaml.Yaml.load(Yaml.java:399)
at org.bukkit.configuration.file.YamlConfiguration.loadFromString(YamlConfiguration.java:53)
... 24 more

Could it be my craftbukkit version?
PS: This problem is happening in version 1.5.2 #2788

 

Check the config for weird symbols. Possibly mcmmo.

 

17xDillz1997 Thank you, but that problem was solved, there was a plugin generating a bunch of erros including this one: LsFirst.

But now I am having a problem verry similar to this one, but on another plugin. And I put it on online yaml parser to check what symbols were generating errors and now it is better, but it still happens when using one specific command. This one i do not know how to fix. I think I have to update the plugin.